This transaction set communicates changes to mortgage or property records to relevant parties in the lending and real estate ecosystem. Lenders, servicers, title companies, or property record custodians send the 266 to notify receivers—including secondary market investors, regulatory bodies, or other stakeholders—of modifications affecting a mortgage loan or associated property. The BGN (Beginning Segment) establishes the notification context and timing, the N1 Loop (Name) identifies the parties involved such as the borrower, property owner, or servicer, and the LX Loop (Assigned Number) structures individual record change items with their corresponding details through segments like API (Activity or Process Information) and DTP (Date or Time or Period), allowing multiple change notifications to be bundled in a single transmission.

For example, Heritage Bank Services uses the 266 to notify Fannie Mae when a borrower’s address changes or when a property tax assessment is updated. Heritage Bank would send a 266 containing the borrower information in the N1 loop, then populate the LX loop with specific changes—such as a new property address captured in the N3 (Address Information) segment or a revised assessed value in the AMT (Monetary Amount) segment. The nested N9 loop references the loan number and related identifiers, while the API segment within the 0222 loop documents the nature of the change (for instance, borrower relocation or property reassessment) along with applicable dates. This structured notification ensures Fannie Mae’s records remain synchronized with current mortgage and property data.