You will know if what you have received is an OFAC subpoena. Each OFAC administrative subpoena clearly states at the top, in large bold black letters, “ADMINISTRATIVE SUBPOENA”. The subpoena will have an assigned enforcement case number marked with the letters “ENF.” Subpoenas are usually mailed to individuals personally or to a company’s CEO or president. To be brief, it will be obvious to identify whether the letter received is an administrative subpoena from OFAC.