Every note should end in a next action, and it helps to agree on the rule before the drive. Here is one we'd start with. Two or more signals on one house, or any posted notice, get a records lookup. A single signal that could change within a month, such as an overgrown yard, gets a revisit in about 30 days and a second photo from the same spot. A dumpster or a for-sale sign gets a look at the sale and listing history, and then you decide whether the house still fits what you buy. Adjust the thresholds as your own results come in.
The records lookup adds context to the street note, and each field has a limit. PropertyRadar's criteria glossary describes Site Vacant as a flag from the US Postal Service. Its vacancy guide gives short-term rentals as one reason an occupied property gets flagged, and says you will likely have to confirm vacancy with more research. The flag and a full mailbox can both come from the same undelivered mail, so treat them as one indication. A different kind of evidence, such as the neighbor's statement or a later visit, adds more.
Owner Occupied is true when the owner claims the property as a primary residence or the owner's address matches the property address. A "no" doesn't tell you who lives in the house. It does tell you the first letter should go to the owner's mailing address. Property Tax Delinquent is accurate as of the last tax status update, so a payment made since then isn't shown. In Foreclosure covers three stages: preforeclosure, auction and bank owned.
A tax delinquency, a preforeclosure or a scheduled auction adds a recorded obligation to what you saw from the curb, and that is a good reason to move a house up your list. Bank owned means the lender now holds title, which changes who you would contact. The street informs the record as well. PropertyRadar's guide tells drivers to compare what they see with the property data and correct the record where the street disagrees with it.
A posted notice gets its lookup at the county. Hillsborough County, Florida, for example, lets you search code cases by street address or folio number, and the results can include the case status, the violation description and inspection dates. That gets you the violation without a step onto the property. The search returns past cases as well as open ones, so match the case address and dates to the notice you photographed before you treat them as the same matter.
When a house is ready for a letter or a call, what to verify before contacting an off-market owner covers the checks that come first.