Important: Signed documents, which have a valid time stamp, are considered to have valid signatures, regardless of the age, or revocation status, of the signing certificate.

A certificate is usually valid for a year, after which, the signer must renew, or get a new, a signing certificate to establish identity. Certificates are issued by a certification authority, and like a driver’s license, can be revoked. When you send a digitally-signed macro or document, you also send your certificate and public key. Signing certificate To create a digital signature, you have to have a signing certificate, which proves identity. Signing certificate and certificate authority A signature confirms that the information originated from the signer and has not been altered. Remove invisible digital signatures from Word, Excel, or PowerPointĪ digital signature is an electronic, encrypted, stamp of authentication on digital information such as e-mail messages, macros, or electronic documents. Invisible digital signatures in Word, Excel, or PowerPointĪdd invisible digital signatures in Word, Excel, or PowerPoint Note: In addition, you can remove a signature by selecting the arrow next to the signature in the Signature Pane. To add additional signature lines, repeat these steps. Show sign date in signature line The date the document was signed will appear with the signature.Allow the signer to add comments in the Sign dialog box Allow the signer to type a purpose for signing.Select one or both of the following check boxes: Instructions to the signer: Add instructions for the signer, such as 'Before signing the document, verify that the content is correct.' Suggested signer's e-mail address: The signer's e-mail address, if needed. Suggested signer's title: The signer's title, if any. Suggested signer: The signer's full name. In the Signature Setup dialog box, type information to appear beneath the signature line:

On the Insert tab, select Signature Line in the Text group. In the document or worksheet, place your pointer where you want to create a signature line. To learn about digital signatures (also known as digital ID), what they can be used for, and how to them in Word, Excel, and PowerPoint, see All about digital signatures.

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