Abstract: Electronic signatures valid in printed or scanned form. Electronic signatures are embedded in documents such that the electronic signatures are valid even when the document is scanned, printed or stored in paper form. A document includes a barcode embedded into the document. The barcode includes a unique document ID and a unique signature ID identifying the document and the signer of the document. The document also includes language embedded into the document indicating that the signer of the document authorizes paper versions of the document to be accepted as containing a valid electronic signature.