Can I add signature box to an existing template document saved in OneDrive for continuous use?

Hello.

I have a document saved in our business OneDrive as a report template for our engineers.

I want to be able to add a signature box to this document so that each time our engineer completes the form he can then get a signature from the client and save the document. is there a way of doing this so that when they open this document each time the signature box is incorporated into the document?