From the paper on the table
A PDF, or photos of the paper pages (JPEG, PNG, or HEIC from an iPhone), up to 30 pages. For a Word file or a Google Doc, save it as a PDF first: File, Download, PDF.
Supervision notes, two signatures
A supervisor and a supervisee each get their own fields on the same document, and each signs in their own place from the same link. The second person sees the first signature already there.
You know when it is signed
You get an email at every signature. The last one arrives as a single email saying the document is fully signed, with a link straight to it.
Kept for good
No countdown, no expiry date, no delete button. Every document you send is still there next month and next year. The original you upload is never altered: each signature is stored on its own, and the signed PDF is put together from them.