Load a PDF, place your signature, initials or seal from the toolbar or from one of your templates, then click Sign and download. A template with several signatories is merged: you sign all of its zones. The document is certified by Secure Exchanges and signed with your marks, exactly as when you send it, then saved as a message to yourself and downloaded, with no email sent. Download latest signed version then gets it again. If you change the zones, sign again to include them. Anyone can verify the file at any time on the PDF integrity validation page.