Tip: Know Medicare’s rules on providers’ signatures. Before you submit your medical documentation to Medicare, there’s one last piece of the puzzle that must be in place — the provider’s signature. Medicare requires that services provided or ordered be authenticated by the author, and the method used for authenticating would be a handwritten or electronic signature. Stamped signatures are not acceptable with the exception of the author having a physical disability that prevents them from signing the record. Review the following chart to determine whether you’ve met the signature requirements dictated by the Centers for Medicare & Medicaid Services (CMS):