By Pallav Boonlia
Founder & CTO, NakodaX ·
NakodaX blog/Document Protection·3 min read
Can you revoke a document after sending it?
You cannot take back an ordinary PDF once it is sent. With NakodaX Document Protection you can revoke access, and the file stops opening from then on, on any device. Revoking does not erase what someone already saw. It stops every opening after you revoke.
Revoking access stops the next opening. It does not undo the last one.
On this page
You send a proposal on a Tuesday. Two weeks later the deal falls apart, and someone asks the question everyone asks. Can we get that file back?
It depends on what you sent. An ordinary PDF is theirs once it leaves your inbox. A document you protected before sending can be closed, though not in the way people often imagine. Revoking does not erase the past. It changes what happens the next time someone tries to open the file.
What happens when you send an ordinary file?
An ordinary PDF or Word file is complete in itself. The moment it lands in an inbox, the recipient has a full, readable copy. Deleting your copy, turning off a link or asking them nicely to delete it does nothing to what they already downloaded or forwarded.
That is not a flaw in any app. It is what sending a file has always meant.
What does revoking access do?
A protected document works differently from the start. Before it leaves your browser, the content is encrypted. What your partner receives is a container that checks for permission every time it opens.
When you revoke, you do not reach into their computer. You change the answer the permission check gives. The next time anyone tries to open the file, on any device, the check fails.
How do you set it up in NakodaX?
Protect the document, share it by email, and set the rules before you send. Choose an expiry of 1, 7, 30 or 90 days, or a date. Choose how many times it can be opened: 1, 3, 5, 10, 25 or unlimited. Recipients need no account. If a recipient forwards the file, the new reader can ask for access, and you or the recipient decides.
Later, revoke that share in one click. Rotating your key revokes every active share.
What can revoking not do?
It cannot make a person forget what they read. It cannot undo a screenshot or a photo of a screen. No product can honestly promise that.
What it stops is the quiet, everyday kind of exposure: the file in a downloads folder, the copy forwarded without a thought, the old version opened again six months later.
When is it worth doing?
A deal falls through. A contractor or agency contract ends. Someone gets the wrong file, or a mailing list changes after you hit send.
The takeaway
An ordinary document is gone the moment you send it. A protected one stays yours to close.
Related product
NakodaX Document Protection
Protect documents before sharing. Control who can open them, what they can see, when access ends and how protected documents are used.
See how it worksCommon questions
Can you recall an email attachment?
Not an ordinary one. A document protected with NakodaX is not the content itself, so you can close it after sending.
Does revoking delete the file from the recipient's computer?
It stops the file opening. It does not undo anything the recipient already saw.
Can I set a document to stop opening on its own?
Yes. Set an expiry date or a limit on the number of opens before you send.
