On Apr 12, 2023, at 20:42, Stewart C. Russell via talk <talk@gtalug.org> wrote:

Is your PDF signed with a certificate where Acrobat Reader (say) has a copy of the master certificate? If so, and you're presenting the document electronically, it's as valid as if it were wet signed.

This is a big "in theory", though. Legally, it's valid. If the receiving party decides they don't understand it/accept it, wet signed on paper it has to be. Ask me about the project I worked on where an Ontario government agency promised they would accept cryptographically-signed PDFs, then the project officer we were assigned did a "Computer Says No «cough»". We had to chase round southern Ontario trying to track down 300 contractors with box files of paperwork ...

I see.
Yes, that's one of the things universal government run PKI will (should) solve. Even my 87 year old grandmother understands and regularly uses digital signing. That's of course mostly because she is forced to, both because she is in Canada most of the time and because the government and large corporations in Estonia often make those things that can be done online, nearly impossible to do in person, forcing everyone to get on with the program. That's not the Canadian way.