90. Do you offer a Specially Designated Nationals (SDN) changes file or "delta file" in a data format? Do you offer delta files for OFAC's other sanctions lists?

Yes, OFAC offers a delta file as part of its Sanctions List Service (SLS).  While this delta file format is used by OFAC to update its sanctions lists on SLS, members of the public may use this file as well.  OFAC also records changes to the SDN list and other sanctions lists in human-readable form in the recent actions section of its website.  An archive of changes files found on this page.  Database administrators interested in refreshing their databases with new SDN and other sanctions list data should use the comprehensive data files available on OFAC's website and completely refresh the list.