If I reject or block a transaction, when do I have to report the action to OFAC? How do I submit the report?

Question: If I reject or block a transaction, when do I have to report the action to OFAC? How do I submit the report? Answer: 31 C.F.R. Parts 501.603 and 501.604 require blocking and reject reports to be submitted to OFAC within 10 business days of the date of the action. Optional reporting forms are available at this link and complete information may be emailed to OFAC's Sanctions Compliance and Evaluation Division at ofacreport@treasury.gov . Blocking and reject reports must contain a copy of the original transfer instructions.