First things first, to create a digital signature, you must have a signing certificate, which proves identity and verifies the authenticity of the document. So, when you send a digitally signed file ...

Use the following suggestions to fix the Your signature could not be added to the document error in Microsoft Excel. The first step is to check for Office updates ...

Microsoft Office 2007's digital signature feature allows users to finalize documents with a stamp of approval. Digitally signed documents cannot be edited or altered, securing their contents; this is ...