Why email attachments are the weakest link
An attached PDF is a permanent, uncontrolled copy. It sits in the recipient’s inbox, syncs to their devices, gets auto-forwarded, and survives every relationship change. You cannot see whether it was opened, and you certainly cannot take it back.
1. Use a protected link instead of an attachment
A protected share link keeps the file on the server and streams pages to a secure viewer. The recipient sees the document; they never possess it. If the link leaks, you disable it — something an attachment can never offer.
2. Set an expiry date and a view limit
Most documents only need to be readable for days or weeks. An expiry date ends access on schedule, and a view cap stops a link from being passed around a whole office. Both are one-click settings in AssetGuard and require no follow-up on your part.
3. Watermark every page with the viewer’s identity
A visible watermark carrying the viewer’s email and timestamp turns every page into a traceable artifact. People are dramatically less likely to photograph or share a document that names them on every page.
4. Disable printing, copying, and downloading
If the recipient only needs to read, keep the document read-only: block printing, text selection, and downloads. Grant more rights only to the people who genuinely need them — permissions are set per link, not per document.
5. Watch the access log — and revoke when in doubt
Read receipts and access logs tell you the moment your document is opened, from which device and location. Anything unexpected — a login from another country, dozens of views in an hour — is your cue to revoke first and ask questions later.
Combine all five and you get the practical definition of secure PDF sharing: visibility, control, and an undo button.