Documentation must meet Medicare’s signature requirements. If Medicare claims reviewers cannot validate the signatures, Medicare Administrative Contractors (MACs) deny the claim, assess an error, and begin recouping overpayments. Questions I receive regarding signatures include the following: How does CMS define a handwritten signature? What if I use a scribe when documenting medical record entries? What is required for a valid signature? What should I do if I did not sign a medical record? What if I signed the order or progress note but my signature is not legible? What is a signature log? Am I able to attest to my