I am trying to encrypt a pdf file with a password but I can't because it has already been signed or certified? I haven't signed the document and I don't see any other signatures in it so how do I get around this because I can't send the document to the recipient without a password?
Please confirm if the file is signed by somebody else and to check the same you may follow the steps below:
If the document is signed by somebody else you will have to check with them to clear the signature.
Also you can check and
If that would be the case, you would not be able to override the security and so you will have to contact the creator of the document.
Let me know if you need more help.