What Does an ATTOMID of All 9s (e.g., 999999999) Mean? - CUSTOMER

Short Answer (Customer-Ready)

An ATTOMID populated with all 9s (e.g., 999999999) indicates that the record could not be matched to a parcel or property record in ATTOM’s assessor database at the time it was processed.

These records represent valid transactions but are unmatched at the property level.

Detailed Explanation

An ATTOMID of all 9s is assigned when a transaction record cannot be confidently linked to a property in the assessor database.

·         The address or parcel information cannot be fully standardized.

·         The property is new construction or recently created and not yet reflected in assessor data.

·         The recorded document lacks sufficient parcel identifiers.

·         The parcel data is incomplete, conflicting, or formatted inconsistently.

ATTOM continuously attempts to rematch these records as updated assessor data becomes available. If a match is later identified, the record will be updated with a standard ATTOMID.

What This Does Not Mean

·         The transaction is invalid.

·         The record is corrupt.

·         The property does not exist.

·         The record should be excluded from transaction-level analysis.

This status only indicates that a property-level match was not available at processing time.

Integration Guidance

·         Records with an ATTOMID of all 9s should be treated as standalone transaction records.

·         They should not be used for joins to property-level ATTOM datasets.

·         If property linkage is required, downstream logic should account for unmatched records.