Supporting Documentation
Supporting documentation and a copy of the filed form must be retained by the MSB for a period of five years from the date of the date of filing the SAR. Supporting documentation includes relevant business records such as copies of instruments; copies of money transfer forms; receipts; sale, transaction or clearance records, and photographs, surveillance audio and/or video recording medium. Originals or the business record equivalent must be kept with a copy of the filed SAR.
31 CFR 103.20 (c)