Can I add customer sign at estimate pdf? Jay K April 22, 2017 05:17 Updated You can add a signature for a particular estimate. To use this signature inside PDF you must select “Customer Signature” from Company Signature 1 or 2. You can add a signature from estimate details page by click on Sign button. - Moon Invoice Related articles How to add Signatures for my Invoice? Comments 0 comments Please sign in to leave a comment.