Return of unnegotiated Government checks
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
All unnegotiated United States Government checks drawn to the order of a decedent representing money due as defined in § 178.202, and in the possession of the claimant, should be returned to the employing agency concerned. Claimants should be instructed to return any other United States Government checks drawn to the order of a decedent, such as veterans benefits, social security benefits, or Federal tax refunds, to the agency from which the checks were received, with a request for further instructions from that agency.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.