Create a Digital Signature A Digital Signature can be created in Windows, not Word. The steps are given, below. The certificate created with this program is "self-signed," which means that it is not independently verified by a commercial signing server. So, this self-signed certificate is for personal use, only.   2. Try it: Add a Digital Signature Go to Start ->All Programs. Go to Microsoft Office. Go to Microsoft Office Tools. Click Digital Certificate for VBA Projects   You will be prompted to enter a name for your certificate. When you click OK, you should see a little window that confirms your signature was created successfully.   Please return to Excel and keep going. Start ->All Programs->Microsoft Office->Microsoft Office Tools->Digital Certificate for VBA Projects Exam 77-888: Microsoft Excel Expert 2010 1. Sharing and Maintaining Workbooks 1.1. Apply workbook settings, properties, and data options: Add a Digital Signature