An auto signature is a personalized block of text, and often images, that is automatically added to the end of various digital documents, including emails, electronic contracts, PDFs, and other electronic files.

Sign and send back an unlimited number of documents for free. However, if you’re collecting signatures, you can only send three documents with a free Docusign account.

Digitally sign business documents online with Zoho Sign. Automate paperwork using complete digital signature document workflows to collect signatures securely.

Auto Doc Signer is a cross-platform digital signing solution for automated, secure document signing using USB tokens or PFX files. Works on Windows, Linux, macOS, Web & API.

Xodo Sign (formerly eversign) makes it simple to edit, sign, and send documents online. Get fast, secure electronic signatures and built-in editing tools to manage contracts - all in one place.