You can remove a digital signature from a Microsoft Office document that has been digitally signed.

1. Open the document that contains the signature you want to remove.
2. Click the Microsoft Office Button, point to Prepare, and then click View Signatures.
3. In the Signatures task pane, point to the signature that you want to remove, click the arrow that appears on the right, and then click Remove Signature.
4. When you are asked if you want to permanently remove the signature, click Yes.