Contract, contract modifications, blanket purchase agreements, and task and/or delivery orders may be executed manually or electronically using a digital signature. In the absence of the original contracting officer, another contracting officer with appropriate warrant authority may sign. Always type or stamp the name and title of the contracting officer signing the contract on the document, unless it is electronically signed. An electronic contract which includes the name of the contracting officer satisfies the typed, stamped or printed requirement found in FAR 4.101. GSA Order CIO 2162.2, GSA Digital Signature Policy, is the guidance for the use of digital signatures as the preferred means of providing signatures for GSA documents, forms, correspondence, and emails.