When you first sign up for GetAccept you will not have a signature saved to your user profile.
For the system to capture and save your signature for future use, you will need to send a document out through GetAccept that has the "Sender will Sign this Document" option enabled.
How to create and save your handwritten signature
Your signature will now be saved for future send-outs. You will notice it appear on the final signature certificate as well as anywhere you place a sender signature field on your document or template.
You can also change your signature in the smartphone app. To do so, open the app, go to settings > My Signature, and draw the new one.
Press Save and the signature has now been updated.