A colleague is trying to sign a document that has already been signed by at least one person. When he tries to use his digital ID, which was saved in his Mac's keychain, he gets a "Bad parameter" error box, followed by an unknown error box that says "Support information: CGetSigningParams-4001"
General troubleshooting, Security digital signatures and esignatures
Thank you for the suggestion. I followed your instructions and Adobe Acrobat DC still reports one error "Bad parameter", but now I can see the signature dialogue box. However, when I try to apply it to the document, it fails to sign it nonetheless.
Also, I realize that I forgot to mention something that may be relevant. This is a document where another person has already signed on another line, but the document wasn't routed through Adobe Sign. I think it was a simple document that had signature fields added (3 of them) with the idea of having three different persons sign it. I wonder if the fact that one person already signed properly with what looks like an embedded Adobe digital signature may be the cause of the problem?