Combine the two common criteria with AND and run the two rare ones as separate segments on top of that base. Absentee ownership is a mailing-address comparison and estimated equity is a ratio between two modeled numbers, so both are ordinary attributes across a residential county [1][3]. USPS vacancy needs 90 days or more of uncollected mail before an address is counted [4], and tax delinquency carries a county collector's date [7], which is why a four-way AND across a mid-size county can collapse to a few dozen records. Cut exclusions for listed, recently sold, entity-owned, and unreachable records before anything mails, since sellers using the National Do Not Call Registry have to synchronize their calling lists at least every 31 days [10]. Give each segment its own mail code, because two response rates read against each other say which criterion earned its place.
\n","summary":"A four-way AND across one county can leave a few dozen records while the same four filters joined with OR return nearly the whole absentee base. This answer covers what each field records, where AND belongs, where a segment split works better, and which exclusions to cut before anything mails.","publishedAt":"2026-08-18T16:20:00","verifiedAt":"2026-08-18T00:00:00","editorialStatus":"APPROVED","lastReviewedAt":"2026-08-18T00:00:00","nextReviewDueAt":"2026-11-18T00:00:00","templateVersion":"v2","aliases":["How do I stack absentee, equity, vacancy, and tax delinquent filters?","Should I use AND or OR when combining property list filters?","Why does my four-filter property list return only 30 records?","How many criteria should a motivated seller list use?","What is list stacking in real estate investing?","How do I keep a stacked property list from getting too broad?","Should vacancy and tax delinquency be separate campaigns?","In what order should property list filters be applied?","How do I know which list filter is producing responses?","Which exclusions belong in a motivated seller list?"],"confidenceScore":76,"confidenceLabel":"Medium","canonicalUrl":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"contributorOrganizationProfile":{"entityId":"ec39deab-44fe-48d8-9029-fefe993ab85a","legalName":null,"description":null,"websiteUrl":null,"imageUrl":null,"slogan":null,"subtitle":null,"facts":[],"coiNote":null,"foundingDate":null,"numberOfEmployeesText":null,"contactPoint":null,"address":null,"headquartersText":null,"organizationType":null},"contributorPerson":{"slug":"answerstack-editorial-team","displayName":"AnswerStack Editorial Team"},"sections":[{"id":"37b67062-5347-49c2-94d8-48a3d77f1db6","sectionKey":"how_to_order_the_filters","sectionType":"markdown_section","heading":"How should you order the four filters?","introMarkdown":"Geography and property type come first, because those two set the universe before any owner attribute applies. Absentee ownership and an estimated equity floor go in next as AND terms, since together they describe an owner who could sell without bringing money to closing. Cut the exclusions after that, then split what remains into a vacancy segment and a tax delinquency segment that mail separately.\n\nThe rarest criterion sets the ceiling under AND, which is why adding both scarce fields to one filter collapses the result. USPS vacancy and multi-year delinquency describe a small fraction of parcels in most markets [4][6], while absentee ownership and a 50 percent equity floor describe a large share of them. A four-way AND across a mid-size county can land at a few dozen records, and the same filters joined with OR can return close to the entire absentee base.\n\nPropStream prices skip tracing at 12 cents a contact on Essentials and 10 cents on Pro and Elite [8]. A list that runs 20,000 wide instead of 2,000 narrow therefore carries an $1,800 difference before a postcard prints. The cost runs both ways, because an over-broad list pays for contacts nobody works while an over-narrow one leaves the county's remaining workable records unfound.\n\nEach segment mails under its own code, so a response rate is attributable to the filter that produced it. A vacant absentee property with equity and a tax-delinquent absentee property with equity are different conversations, which means one postcard sent to both wastes the difference between them.","introHtml":"Geography and property type come first, because those two set the universe before any owner attribute applies. Absentee ownership and an estimated equity floor go in next as AND terms, since together they describe an owner who could sell without bringing money to closing. Cut the exclusions after that, then split what remains into a vacancy segment and a tax delinquency segment that mail separately.
\nThe rarest criterion sets the ceiling under AND, which is why adding both scarce fields to one filter collapses the result. USPS vacancy and multi-year delinquency describe a small fraction of parcels in most markets [4][6], while absentee ownership and a 50 percent equity floor describe a large share of them. A four-way AND across a mid-size county can land at a few dozen records, and the same filters joined with OR can return close to the entire absentee base.
\nPropStream prices skip tracing at 12 cents a contact on Essentials and 10 cents on Pro and Elite [8]. A list that runs 20,000 wide instead of 2,000 narrow therefore carries an $1,800 difference before a postcard prints. The cost runs both ways, because an over-broad list pays for contacts nobody works while an over-narrow one leaves the county's remaining workable records unfound.
\nEach segment mails under its own code, so a response rate is attributable to the filter that produced it. A vacant absentee property with equity and a tax-delinquent absentee property with equity are different conversations, which means one postcard sent to both wastes the difference between them.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":10},{"id":"9defabb2-61a3-4212-804a-ba95cd8d7171","sectionKey":"criteria_definition_table","sectionType":"table_section","heading":"What does each of the four criteria record?","introMarkdown":"The table sets the four criteria against the field each one reads, the date that rides with it, and what it fails to establish.","introHtml":"The table sets the four criteria against the field each one reads, the date that rides with it, and what it fails to establish.
\n","outroMarkdown":"Read the last column first, because the false positive in each row is what an over-stacked filter hides.","outroHtml":"Read the last column first, because the false positive in each row is what an over-stacked filter hides.
\n","contentJson":{"rows":[{"cells":["Absentee ownership","Assessor mailing address compared against the site address [1]","The owner's last change of address, often the recording date [2]","That the owner lives elsewhere, since no-delivery areas match the pattern [1]"]},{"cells":["Estimated equity","A modeled value set against recorded loan amounts [1]","A valuation refresh independent of the loan records [3]","A payoff figure, because both sides are estimates [3]"]},{"cells":["Vacancy","USPS staff marking an address as not collecting mail [4]","90 days of non-collection, aggregated quarterly [4]","That the house is empty, since short-term rentals carry the flag [5]"]},{"cells":["Tax delinquency","County collector assessment and payment records [6]","The delinquency date and the list's own as-of date [7]","The current balance, which only the collector confirms [6]"]}],"columns":["Criterion","Where the field comes from","The date attached to it","What it does not establish"]},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":20},{"id":"db88ed24-4ed2-41b0-88c8-360cefa9a553","sectionKey":"what_each_criterion_means","sectionType":"markdown_section","heading":"What does each criterion mean in the data?","introMarkdown":"### Absentee ownership\n\nPropertyRadar's glossary treats a property as owner occupied when the owner's address matches the site address [1]. The same rule covers an owner claiming the property as a primary residence, and the page flags the false positive in areas with no mail delivery, where an occupying owner carries a different mailing address [1]. San Bernardino County's assessor-recorder adds a second lag, taking the mailing address from the Preliminary Change of Ownership Report signed at recording and keeping it until the owner files a change request [2].\n\n### Estimated equity\n\nEstimated equity is a ratio between two modeled numbers, which is a different kind of fact from a payoff quote. The glossary runs the arithmetic through a property carrying a $50,000 first mortgage and a $30,000 second against a $100,000 estimated value, producing a combined loan-to-value of 80 percent [1]. PropertyRadar's value side is a commercial-grade automated valuation model that does not account for property condition [3].\n\n### USPS vacancy\n\nHUD counts an address as vacant once delivery staff on urban routes identify it as not collecting mail for 90 days or longer [4]. USPS submits those aggregate counts quarterly, so the field describes a condition that began at least three months earlier [4]. PropertyRadar's vacancy guide warns that a myriad of reasons can mark a property vacant while somebody lives in it, naming short-term rentals such as Airbnbs and vacation markets where results have to be confirmed with additional research [5].\n\n### Tax delinquency\n\nTax delinquency is a collector's status, and PropertyRadar's glossary notes that most tax jurisdictions initiate a tax sale once taxes are 5 years delinquent [1]. Its tax delinquent data guide says updates arrive daily while the refresh rate for a given property varies by county, and it recommends confirming payment status with the county tax collector before bidding [6]. Mecklenburg County's Office of Tax Administration stamps its monthly list as reflecting the tax record as of August 4, 2026, naming the owner shown on tax records as of the January 6, 2026 delinquent date [7].","introHtml":"PropertyRadar's glossary treats a property as owner occupied when the owner's address matches the site address [1]. The same rule covers an owner claiming the property as a primary residence, and the page flags the false positive in areas with no mail delivery, where an occupying owner carries a different mailing address [1]. San Bernardino County's assessor-recorder adds a second lag, taking the mailing address from the Preliminary Change of Ownership Report signed at recording and keeping it until the owner files a change request [2].
\nEstimated equity is a ratio between two modeled numbers, which is a different kind of fact from a payoff quote. The glossary runs the arithmetic through a property carrying a $50,000 first mortgage and a $30,000 second against a $100,000 estimated value, producing a combined loan-to-value of 80 percent [1]. PropertyRadar's value side is a commercial-grade automated valuation model that does not account for property condition [3].
\nHUD counts an address as vacant once delivery staff on urban routes identify it as not collecting mail for 90 days or longer [4]. USPS submits those aggregate counts quarterly, so the field describes a condition that began at least three months earlier [4]. PropertyRadar's vacancy guide warns that a myriad of reasons can mark a property vacant while somebody lives in it, naming short-term rentals such as Airbnbs and vacation markets where results have to be confirmed with additional research [5].
\nTax delinquency is a collector's status, and PropertyRadar's glossary notes that most tax jurisdictions initiate a tax sale once taxes are 5 years delinquent [1]. Its tax delinquent data guide says updates arrive daily while the refresh rate for a given property varies by county, and it recommends confirming payment status with the county tax collector before bidding [6]. Mecklenburg County's Office of Tax Administration stamps its monthly list as reflecting the tax record as of August 4, 2026, naming the owner shown on tax records as of the January 6, 2026 delinquent date [7].
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":30},{"id":"fefe3eec-c524-4726-8511-ac09552233d5","sectionKey":"and_versus_or","sectionType":"markdown_section","heading":"Why does AND collapse a list while OR inflates it?","introMarkdown":"AND returns the intersection of the criteria and OR returns the union, which is why the same four filters can produce 30 records or 21,000 from one county. Absentee ownership and a 50 percent equity floor are ordinary attributes across a residential county, while USPS vacancy and multi-year delinquency describe a small fraction of parcels [4][6]. Adding both rare criteria to a single AND hands the ceiling to whichever one is scarcer.\n\nMecklenburg County, North Carolina works as a test case, since its Office of Tax Administration publishes the delinquency side in the open [7]. The counts below are illustrative round numbers chosen to show the shape of the narrowing, and none is a live search result from any platform. What holds across counties is the ratio between the steps, because absentee and equity criteria move a list by halves while vacancy and delinquency move it by orders of magnitude.\n\nA base of single-family residential parcels flagged non-owner-occupied might run around 40,000 in a county that size. A 50 percent equity floor as an AND term takes it to roughly 20,000. USPS vacancy as a third AND term drops it to roughly 600, and a year or more of tax delinquency as a fourth leaves roughly 30 records standing.\n\nThirty records is a workable call list and a poor campaign, because a segment that small returns too few replies to separate one filter's contribution from another's. The same four criteria joined with OR inside that base land near 21,000, since the equity term alone qualifies most of the absentee base. The stacking question comes up regularly on investor forums, where BiggerPockets threads work through spreadsheet versions of the same split [14].","introHtml":"AND returns the intersection of the criteria and OR returns the union, which is why the same four filters can produce 30 records or 21,000 from one county. Absentee ownership and a 50 percent equity floor are ordinary attributes across a residential county, while USPS vacancy and multi-year delinquency describe a small fraction of parcels [4][6]. Adding both rare criteria to a single AND hands the ceiling to whichever one is scarcer.
\nMecklenburg County, North Carolina works as a test case, since its Office of Tax Administration publishes the delinquency side in the open [7]. The counts below are illustrative round numbers chosen to show the shape of the narrowing, and none is a live search result from any platform. What holds across counties is the ratio between the steps, because absentee and equity criteria move a list by halves while vacancy and delinquency move it by orders of magnitude.
\nA base of single-family residential parcels flagged non-owner-occupied might run around 40,000 in a county that size. A 50 percent equity floor as an AND term takes it to roughly 20,000. USPS vacancy as a third AND term drops it to roughly 600, and a year or more of tax delinquency as a fourth leaves roughly 30 records standing.
\nThirty records is a workable call list and a poor campaign, because a segment that small returns too few replies to separate one filter's contribution from another's. The same four criteria joined with OR inside that base land near 21,000, since the equity term alone qualifies most of the absentee base. The stacking question comes up regularly on investor forums, where BiggerPockets threads work through spreadsheet versions of the same split [14].
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":40},{"id":"af927c4c-6acf-4666-8e19-4b6b3c568b5e","sectionKey":"filter_stack_steps","sectionType":"table_section","heading":"How does the stack run, step by step?","introMarkdown":"The table walks one stack from the base universe to the exclusion pass, with the illustrative Mecklenburg counts on the steps that change the size.","introHtml":"The table walks one stack from the base universe to the exclusion pass, with the illustrative Mecklenburg counts on the steps that change the size.
\n","outroMarkdown":"Steps 4 and 5 are the ones most operators run as third and fourth AND terms, and moving them into segments keeps the base workable.","outroHtml":"Steps 4 and 5 are the ones most operators run as third and fourth AND terms, and moving them into segments keeps the base workable.
\n","contentJson":{"rows":[{"cells":["1","Mecklenburg County, single-family residential","Base","Sets the universe before owner attributes apply","Geography and property type set the buy box"]},{"cells":["2","Owner occupied = No","AND","Leaves roughly 40,000 (illustrative)","Absentee ownership changes who receives the mail [1]"]},{"cells":["3","Estimated equity of 50 percent or more","AND","Halves the base to roughly 20,000 (illustrative)","An owner below the floor may owe more than a sale clears [1]"]},{"cells":["4","Site vacant = Yes","Segment, not AND","Moves roughly 600 records to their own campaign (illustrative)","Vacancy is a timing signal and a deliverability warning [1]"]},{"cells":["5","Years tax delinquent of 1 or more","Segment, not AND","Moves a few hundred records to a second campaign (illustrative)","Delinquency carries a county date the others do not [7]"]},{"cells":["6","Listed, sold within 12 months, entity-owned, no mailing address","Exclusion","Removes records the campaign cannot work","An unreachable owner costs the same to buy as a reachable one [8]"]}],"columns":["Step","Filter","AND or segment","What it does to the count","Why"]},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":50},{"id":"584517e9-bc80-4e0e-aca8-c1e21101d1ad","sectionKey":"exclusions","sectionType":"markdown_section","heading":"Which exclusions belong in the stack?","introMarkdown":"An active or pending listing means an agent is already handling the conversation, so those records leave the stack first. An expired or withdrawn listing earns a separate segment with its own opening line rather than a deletion.\n\nA buyer who closed inside the last 12 months is unlikely to sell, whatever the other criteria say about the parcel. The absentee flag on a recent buyer's record often reflects a mailing address that has not caught up, since the county holds the address filed at recording until the owner asks for a change [2].\n\nEntity-owned parcels belong in the exclusion set for any operation that will not chase a registered agent. PropertyRadar's glossary carries an owner type field with values for corporate and trust ownership, so you can include entities deliberately or drop them in one step [1]. Delaware sets the floor on how little a public record has to hold, since a certificate of formation must set forth only the company name along with its registered office and agent [11].\n\nA record with no usable mailing address costs the same to buy as a reachable one and returns nothing. USPS vacancy exists as a mail-suppression field to begin with, which the glossary states when it describes Site Vacant as data made available in order to suppress mailing to undeliverable addresses [1]. Phone campaigns carry the other constraint, because sellers using the National Do Not Call Registry must synchronize their calling lists with the registry at least every 31 days [10].","introHtml":"An active or pending listing means an agent is already handling the conversation, so those records leave the stack first. An expired or withdrawn listing earns a separate segment with its own opening line rather than a deletion.
\nA buyer who closed inside the last 12 months is unlikely to sell, whatever the other criteria say about the parcel. The absentee flag on a recent buyer's record often reflects a mailing address that has not caught up, since the county holds the address filed at recording until the owner asks for a change [2].
\nEntity-owned parcels belong in the exclusion set for any operation that will not chase a registered agent. PropertyRadar's glossary carries an owner type field with values for corporate and trust ownership, so you can include entities deliberately or drop them in one step [1]. Delaware sets the floor on how little a public record has to hold, since a certificate of formation must set forth only the company name along with its registered office and agent [11].
\nA record with no usable mailing address costs the same to buy as a reachable one and returns nothing. USPS vacancy exists as a mail-suppression field to begin with, which the glossary states when it describes Site Vacant as data made available in order to suppress mailing to undeliverable addresses [1]. Phone campaigns carry the other constraint, because sellers using the National Do Not Call Registry must synchronize their calling lists with the registry at least every 31 days [10].
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":60},{"id":"07949a5e-6005-4edb-8f95-1ed5c041b2bf","sectionKey":"measuring_which_filter_earned_it","sectionType":"markdown_section","heading":"How do you tell which filter earned its place?","introMarkdown":"Each segment mails under its own code, and the comparison that decides anything runs between segments instead of inside a blended list. A vacancy segment and a delinquency segment sent in the same week with the same piece produce two response rates that can be read against each other, while a blended send returns one number for the whole list.\n\nDefine the denominator before the send, because one campaign can report three different rates depending on which base sits below the line. REsimpli's framework for skip-trace quality separates a vendor-reported match rate from a contactable match rate, defined as confirmed working phone or email over total leads loaded [9]. The same page targets a 60 to 80 percent contactable rate against a stated industry baseline of 30 to 40 percent and recommends 12 to 15 touches over 21 days, and those figures are the vendor's own [9].\n\nFour replies from 200 pieces and seven replies from 200 pieces are the same result for planning purposes. A vacancy segment of 600 records is large enough to read once, while a delinquency segment of 30 is a call list one person finishes in an afternoon.\n\nEvery segment is a dated artifact, because the county data underneath it moves on a schedule you do not control. USPS vacancy arrives quarterly [4], tax status refreshes at a pace that varies by county [6], and a monthly county list reports a paid balance only in its following release [7]. Re-pull each segment before it mails and stamp the export with its pull date, which lets a six-week-old response be matched back to its criteria.","introHtml":"Each segment mails under its own code, and the comparison that decides anything runs between segments instead of inside a blended list. A vacancy segment and a delinquency segment sent in the same week with the same piece produce two response rates that can be read against each other, while a blended send returns one number for the whole list.
\nDefine the denominator before the send, because one campaign can report three different rates depending on which base sits below the line. REsimpli's framework for skip-trace quality separates a vendor-reported match rate from a contactable match rate, defined as confirmed working phone or email over total leads loaded [9]. The same page targets a 60 to 80 percent contactable rate against a stated industry baseline of 30 to 40 percent and recommends 12 to 15 touches over 21 days, and those figures are the vendor's own [9].
\nFour replies from 200 pieces and seven replies from 200 pieces are the same result for planning purposes. A vacancy segment of 600 records is large enough to read once, while a delinquency segment of 30 is a call list one person finishes in an afternoon.
\nEvery segment is a dated artifact, because the county data underneath it moves on a schedule you do not control. USPS vacancy arrives quarterly [4], tax status refreshes at a pace that varies by county [6], and a monthly county list reports a paid balance only in its following release [7]. Re-pull each segment before it mails and stamp the export with its pull date, which lets a six-week-old response be matched back to its criteria.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":70},{"id":"f31c6fc8-49cf-4848-83be-22e84b4f6b07","sectionKey":"platform_implementations","sectionType":"markdown_section","heading":"Where do platforms differ on stacking criteria?","introMarkdown":"PropertyRadar counts 250+ search criteria available for building a list [1], and its dynamic lists update automatically when monitored, while an unmonitored dynamic list updates according to its criteria once someone opens it [12]. Saved criteria become the unit of work under that model, so reproducing a segment six weeks later depends on whether it was saved as criteria or frozen as a static set [12].\n\nPropStream puts the same idea behind a monitoring quota, with a Lead Automator that watches 50,000 properties on the Pro plan and 120,000 on Elite [8]. A segment-per-criterion structure spends that quota faster than one stacked list does, since the same parcel can sit in the vacancy segment and the delinquency segment at once. Propwire runs the other way and offers free search across what it describes as 157+ million MLS and off-market properties [13], which is enough to count how far each criterion cuts before anyone pays for the answer.","introHtml":"PropertyRadar counts 250+ search criteria available for building a list [1], and its dynamic lists update automatically when monitored, while an unmonitored dynamic list updates according to its criteria once someone opens it [12]. Saved criteria become the unit of work under that model, so reproducing a segment six weeks later depends on whether it was saved as criteria or frozen as a static set [12].
\nPropStream puts the same idea behind a monitoring quota, with a Lead Automator that watches 50,000 properties on the Pro plan and 120,000 on Elite [8]. A segment-per-criterion structure spends that quota faster than one stacked list does, since the same parcel can sit in the vacancy segment and the delinquency segment at once. Propwire runs the other way and offers free search across what it describes as 157+ million MLS and off-market properties [13], which is enough to count how far each criterion cuts before anyone pays for the answer.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":80},{"id":"5a5ab333-1fb7-432e-a88f-30c88d481a3f","sectionKey":"trade_offs","sectionType":"markdown_section","heading":"What to watch when you run segments","introMarkdown":"Two segments cost more to monitor and more to set up than one stacked list, and these are the trade-offs that show up first.\n\n- Vacancy false positives land in the vacancy segment alone, which is one argument for the split, and short-term rentals are the case PropertyRadar's guide names [5].\n- A delinquency segment goes stale faster than its record count suggests, since a monthly county release reports a payment only in the following month's file [7].\n- Segments under roughly 200 records cannot support a response-rate comparison, so treat those as call lists and read the outcome as anecdote.\n- Widening the geography or lowering the equity floor fixes a thin segment without adding a fifth criterion, because both act on the base instead of the split.","introHtml":"Two segments cost more to monitor and more to set up than one stacked list, and these are the trade-offs that show up first.
\nA filter match records a condition in county data, and it carries no evidence that the owner wants to sell. Absentee ownership says the mailing address differs from the site address, which in a no-delivery area describes an owner living in the house [1].
\nA vacancy flag reports 90 days of uncollected mail on a USPS route [4], and the guide supplying the field warns that an occupied property can carry the flag [5]. An equity figure sits on a modeled value that ignores property condition, which is why a lender's payoff statement can differ from it materially [3].
\nTax delinquency is the one signal with a county date behind it, and even that date describes the record as of a stated day rather than the balance today [7]. Stacking four conditions raises the odds that a parcel sits in some kind of transition without turning any of the four into motivation.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":100},{"id":"f7024cc9-464a-4520-ad07-68dc10b31386","sectionKey":"contributor_perspective","sectionType":"markdown_section","heading":"How this answer was researched","introMarkdown":"The AnswerStack Editorial Team assembled this answer from primary records and vendor documentation, with no commercial relationship to any platform named. County assessor and recorder pages supplied how a mailing address of record is set and how long it can stay wrong, and a county tax administration office supplied the dated structure of a delinquent list.\n\nHUD documents the 90-day USPS vacancy threshold and the Federal Trade Commission documents the 31-day Do Not Call synchronization requirement. State statute supplied the limits of what an entity record has to disclose.\n\nVendor help-center articles and pricing pages supplied the field definitions and per-contact costs behind the arithmetic. Investor forum threads were used only to confirm that the stacking question is a common one, and the record counts in the walkthrough are illustrative rather than pulled from a live search. Corrections from practitioners who run these filters in a specific county are welcome, with a source attached.","introHtml":"The AnswerStack Editorial Team assembled this answer from primary records and vendor documentation, with no commercial relationship to any platform named. County assessor and recorder pages supplied how a mailing address of record is set and how long it can stay wrong, and a county tax administration office supplied the dated structure of a delinquent list.
\nHUD documents the 90-day USPS vacancy threshold and the Federal Trade Commission documents the 31-day Do Not Call synchronization requirement. State statute supplied the limits of what an entity record has to disclose.
\nVendor help-center articles and pricing pages supplied the field definitions and per-contact costs behind the arithmetic. Investor forum threads were used only to confirm that the stacking question is a common one, and the record counts in the walkthrough are illustrative rather than pulled from a live search. Corrections from practitioners who run these filters in a specific county are welcome, with a source attached.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":"This answer was written and reviewed by the AnswerStack Editorial Team, which has no commercial stake in the products, companies, or methods discussed. Every claim is cited inline and verified on the dates shown.","noteHtml":"This answer was written and reviewed by the AnswerStack Editorial Team, which has no commercial stake in the products, companies, or methods discussed. Every claim is cited inline and verified on the dates shown.
\n","sortOrder":110}],"citations":[{"title":"Criteria glossary","url":"https://help.propertyradar.com/en/articles/2507682-criteria-glossary-2007-2026","excerpt":null,"quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-08-26T00:00:00","supportsText":"Owner occupied is set by a primary-residence claim or a mailing address matching the site address, no-delivery areas create false absentee matches, the combined loan-to-value example, Site Vacant as a USPS mail-suppression field, owner type values, the 5-year tax sale threshold, and 250+ available s","domain":"help.propertyradar.com","publisherName":"PropertyRadar"},{"title":"Change of address","url":"https://arc.sbcounty.gov/change-address/","excerpt":null,"quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-08-26T00:00:00","supportsText":"The mailing address of record comes from the Preliminary Change of Ownership Report signed at recording and stays in place until the owner files a change request.","domain":"arc.sbcounty.gov","publisherName":"San Bernardino County Assessor-Recorder-Clerk"},{"title":"How the estimated value of a property is determined","url":"https://help.propertyradar.com/en/articles/1027134-how-do-you-determine-the-estimated-value-of-properties-on-your-site","excerpt":null,"quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-08-26T00:00:00","supportsText":"Estimated value comes from a commercial-grade automated valuation model built on public records that does not account for property condition and is no substitute for a professional opinion of value.","domain":"help.propertyradar.com","publisherName":"PropertyRadar"},{"title":"HUD aggregated USPS administrative data on address vacancies","url":"https://www.huduser.gov/portal/datasets/usps.html","excerpt":null,"quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-08-26T00:00:00","supportsText":"An address counts as vacant once delivery staff on urban routes identify it as not collecting mail for 90 days or longer, and USPS submits those aggregate counts quarterly.","domain":"huduser.gov","publisherName":"HUD USER"},{"title":"Vacancy data guide","url":"https://help.propertyradar.com/en/articles/1700124-vacancy-data-guide","excerpt":null,"quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-08-26T00:00:00","supportsText":"A myriad of reasons can mark an occupied property vacant, including short-term rentals such as Airbnbs and vacation markets, and results have to be confirmed with additional research.","domain":"help.propertyradar.com","publisherName":"PropertyRadar"},{"title":"Using tax delinquent data","url":"https://help.propertyradar.com/en/articles/5215458-using-tax-delinquent-data","excerpt":null,"quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-08-26T00:00:00","supportsText":"Tax delinquency updates arrive daily while the refresh rate for a given property varies by county, and payment status should be confirmed with the county tax collector before bidding.","domain":"help.propertyradar.com","publisherName":"PropertyRadar"},{"title":"Delinquent taxpayer lists","url":"https://tax.mecknc.gov/services/Delinquent-Taxpayer-Lists","excerpt":null,"quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-08-26T00:00:00","supportsText":"The monthly delinquent list reflects the tax record as of August 4, 2026 and names the owner reflected on tax records as of the January 6, 2026 delinquent date.","domain":"tax.mecknc.gov","publisherName":"Mecklenburg County Office of the Tax Collector"},{"title":"Pricing","url":"https://www.propstream.com/pricing","excerpt":null,"quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-08-26T00:00:00","supportsText":"Skip tracing costs 12 cents a contact on Essentials and 10 cents on Pro and Elite, and Lead Automator monitoring covers 50,000 properties on Pro and 120,000 on Elite.","domain":"propstream.com","publisherName":"PropStream"},{"title":"An accuracy framework for skip tracing","url":"https://resimpli.com/blog/accuracy-framework-skip-tracing/","excerpt":null,"quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-08-26T00:00:00","supportsText":"A contactable match rate is defined as confirmed working phone or email over total leads loaded, with a 60 to 80 percent target against a stated 30 to 40 percent industry baseline and a recommended 12 to 15 touches over 21 days.","domain":"resimpli.com","publisherName":"REsimpli"},{"title":"Q and A for telemarketers and sellers about DNC provisions","url":"https://www.ftc.gov/business-guidance/resources/qa-telemarketers-sellers-about-dnc-provisions-tsr","excerpt":null,"quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-08-26T00:00:00","supportsText":"Sellers and telemarketers must synchronize their calling lists with the National Do Not Call Registry at least every 31 days.","domain":"ftc.gov","publisherName":"Federal Trade Commission"},{"title":"Delaware Limited Liability Company Act, section 18-201","url":"https://delcode.delaware.gov/title6/c018/sc02/index.shtml","excerpt":null,"quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-08-26T00:00:00","supportsText":"A certificate of formation must set forth only the name of the limited liability company along with the address of its registered office and the name of its registered agent.","domain":"delcode.delaware.gov","publisherName":"Delaware General Assembly"},{"title":"Understanding lists","url":"https://help.propertyradar.com/en/articles/3764663-understanding-lists","excerpt":null,"quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-08-26T00:00:00","supportsText":"Dynamic lists update automatically when monitored, and an unmonitored dynamic list updates according to its criteria when someone opens it, while a static list carries no criteria.","domain":"help.propertyradar.com","publisherName":"PropertyRadar"},{"title":"Free property data search","url":"https://propwire.com/","excerpt":null,"quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-08-26T00:00:00","supportsText":"Propwire advertises free search across 157+ million MLS and off-market properties along with property-record downloads.","domain":"propwire.com","publisherName":"Propwire"},{"title":"List stacking to find sellers","url":"https://www.biggerpockets.com/forums/93/topics/665935-list-stacking-to-find-sellers-need-some-help","excerpt":null,"quoteText":null,"sourceRole":"CORROBORATING","verifiedAt":"2026-08-26T00:00:00","supportsText":"Corroborates only that combining multiple property lists is a common question among investors, who work the same split by hand with a tab per source list and a type tag on every row.","domain":"biggerpockets.com","publisherName":"BiggerPockets"}],"revisions":[],"relatedAnswers":[{"id":"64169079-69c1-4afc-a411-0716887ba21a","slug":"how-to-use-likely-to-sell-scores","question":"How can predictive \"likely to sell\" scores be used without treating them as proof an owner will sell?","publishedAt":"2026-08-26T15:20:00","confidenceScore":72,"confidenceLabel":"Medium","industry":{"id":"2ca8d285-89d2-418e-86a8-5f0d3639f767","slug":"real-estate-technology","label":"Real Estate Technology","description":"Property intelligence, investment, and proptech"},"topic":{"slug":"property-list-building","label":"Property List Building & Monitoring","description":"Building, stacking, prioritizing, and monitoring property lists from public-record criteria, seller signals, and predictive scores.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"A likely to sell band is a queue position inside one file, and PropertyRadar states a six-month window, monthly rescoring, and marketing-use-only language on its own scores. This answer covers what each band supports, why base rates keep most high-band owners from selling, what to ask about calibration, and how a four-group holdout is designed.","url":"/q/how-to-use-likely-to-sell-scores"},{"id":"f2126891-1709-4d1f-a90f-70c3eaf705b5","slug":"monitored-property-lists-new-matches-owner-changes","question":"How can monitored property lists automatically surface new matches and owner-status changes?","publishedAt":"2026-08-25T16:05:00","confidenceScore":76,"confidenceLabel":"Medium","industry":{"id":"2ca8d285-89d2-418e-86a8-5f0d3639f767","slug":"real-estate-technology","label":"Real Estate Technology","description":"Property intelligence, investment, and proptech"},"topic":{"slug":"property-list-building","label":"Property List Building & Monitoring","description":"Building, stacking, prioritizing, and monitoring property lists from public-record criteria, seller signals, and predictive scores.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"Monitoring re-runs a saved search against the underlying records and fires on two documented triggers, new matches and status changes. Alerts arrive as a push, a daily digest, an immediate email, a Zapier action, or a webhook, and an automation can buy contact data against a metered allowance. Three limits bound the workflow: 10,000 properties per list, 10,000 to 50,000 properties per plan, and up to 30 minutes of delivery lag.","url":"/q/monitored-property-lists-new-matches-owner-changes"},{"id":"3dd52e71-5a83-4421-bf72-65ed7611c44e","slug":"prioritize-off-market-property-list-before-outreach","question":"How should I prioritize an off-market property list before calling or mailing every owner?","publishedAt":"2026-08-20T14:45:00","confidenceScore":78,"confidenceLabel":"Medium","industry":{"id":"2ca8d285-89d2-418e-86a8-5f0d3639f767","slug":"real-estate-technology","label":"Real Estate Technology","description":"Property intelligence, investment, and proptech"},"topic":{"slug":"property-list-building","label":"Property List Building & Monitoring","description":"Building, stacking, prioritizing, and monitoring property lists from public-record criteria, seller signals, and predictive scores.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"Score every record on four separate 0 to 3 scales before anyone dials: property fit, timing evidence, contactability, evidence quality. This answer covers what each band means, why a blended motivation number hides the input that moved, and how three sample records fall into tiers.","url":"/q/prioritize-off-market-property-list-before-outreach"},{"id":"1089a07c-c869-4d97-928c-0476ccef4554","slug":"property-and-owner-signals-motivated-sellers","question":"Which property and owner signals are most useful for identifying potentially motivated sellers?","publishedAt":"2026-08-17T13:05:00","confidenceScore":80,"confidenceLabel":"High","industry":{"id":"2ca8d285-89d2-418e-86a8-5f0d3639f767","slug":"real-estate-technology","label":"Real Estate Technology","description":"Property intelligence, investment, and proptech"},"topic":{"slug":"property-list-building","label":"Property List Building & Monitoring","description":"Building, stacking, prioritizing, and monitoring property lists from public-record criteria, seller signals, and predictive scores.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"Property and owner signals split into three tiers by where the evidence came from. Recorded and filed events carry a date and a named office. Modeled signals report an estimate about a house nobody has seen, and each one needs a measured result before it earns budget. Stated intent is the only tier that came from the owner, and the only one that can create a legal obligation.","url":"/q/property-and-owner-signals-motivated-sellers"}],"contributorStats":{"verifiedAnswers":269,"openDisputes":0},"schemaJson":{"@context":"https://schema.org","@type":"Question","name":"How should I combine absentee ownership, equity, vacancy, and tax delinquency without creating an overly broad list?","text":"How should I combine absentee ownership, equity, vacancy, and tax delinquency without creating an overly broad list?","url":"https://www.answerstack.io/q/combine-absentee-equity-vacancy-tax-delinquency-filters","answerCount":1,"datePublished":"2026-08-18T16:20:00","author":{"@type":"Person","name":"AnswerStack Editorial Team","worksFor":{"@type":"Organization","name":"AnswerStack"},"url":"https://www.answerstack.io/contributors/answer-stack"},"about":[{"@type":"Thing","name":"Property List Building & Monitoring"},{"@type":"Thing","name":"Real Estate Technology"}],"acceptedAnswer":{"@type":"Answer","text":"Combine the two common criteria with AND and run the two rare ones as separate segments on top of that base. Absentee ownership is a mailing-address comparison and estimated equity is a ratio between two modeled numbers, so both are ordinary attributes across a residential county [1][3]. USPS vacancy needs 90 days or more of uncollected mail before an address is counted [4], and tax delinquency carries a county collector's date [7], which is why a four-way AND across a mid-size county can collapse to a few dozen records. Cut exclusions for listed, recently sold, entity-owned, and unreachable records before anything mails, since sellers using the National Do Not Call Registry have to synchronize their calling lists at least every 31 days [10]. Give each segment its own mail code, because two response rates read against each other say which criterion earned its place.","url":"https://www.answerstack.io/q/combine-absentee-equity-vacancy-tax-delinquency-filters","upvoteCount":0,"datePublished":"2026-08-18T16:20:00","dateModified":"2026-08-18T00:00:00","author":{"@type":"Person","name":"AnswerStack Editorial Team","worksFor":{"@type":"Organization","name":"AnswerStack"},"url":"https://www.answerstack.io/contributors/answer-stack"},"citation":[{"@type":"CreativeWork","name":"Criteria glossary","url":"https://help.propertyradar.com/en/articles/2507682-criteria-glossary-2007-2026"},{"@type":"CreativeWork","name":"Change of address","url":"https://arc.sbcounty.gov/change-address/"},{"@type":"CreativeWork","name":"How the estimated value of a property is determined","url":"https://help.propertyradar.com/en/articles/1027134-how-do-you-determine-the-estimated-value-of-properties-on-your-site"},{"@type":"CreativeWork","name":"HUD aggregated USPS administrative data on address vacancies","url":"https://www.huduser.gov/portal/datasets/usps.html"},{"@type":"CreativeWork","name":"Vacancy data guide","url":"https://help.propertyradar.com/en/articles/1700124-vacancy-data-guide"},{"@type":"CreativeWork","name":"Using tax delinquent data","url":"https://help.propertyradar.com/en/articles/5215458-using-tax-delinquent-data"},{"@type":"CreativeWork","name":"Delinquent taxpayer lists","url":"https://tax.mecknc.gov/services/Delinquent-Taxpayer-Lists"},{"@type":"CreativeWork","name":"Pricing","url":"https://www.propstream.com/pricing"},{"@type":"CreativeWork","name":"An accuracy framework for skip tracing","url":"https://resimpli.com/blog/accuracy-framework-skip-tracing/"},{"@type":"CreativeWork","name":"Q and A for telemarketers and sellers about DNC provisions","url":"https://www.ftc.gov/business-guidance/resources/qa-telemarketers-sellers-about-dnc-provisions-tsr"},{"@type":"CreativeWork","name":"Delaware Limited Liability Company Act, section 18-201","url":"https://delcode.delaware.gov/title6/c018/sc02/index.shtml"},{"@type":"CreativeWork","name":"Understanding lists","url":"https://help.propertyradar.com/en/articles/3764663-understanding-lists"},{"@type":"CreativeWork","name":"Free property data search","url":"https://propwire.com/"},{"@type":"CreativeWork","name":"List stacking to find sellers","url":"https://www.biggerpockets.com/forums/93/topics/665935-list-stacking-to-find-sellers-need-some-help"}]}}}