Signing PDFs digitally is kind of a pain, though. There are several different standards, compatible with different readers, and you need to pay up to get a trusted certificate or Adobe will stick a huge "THIS DOCUMENT WAS SIGNED BY AN UNKNOWN PARTY" banner across the screen when you open it. And then you need to opt into the services of a timestamp server to validate your signature or your document might be marked untrusted when your certificate expires.
It's a better technical solution but unfortunately it's not as simple as you'd hope it to be.
Yes it is not perfect. At least in Lithuania you can use government issued personal ID to sign PDFs that pass Adobe/Foxit checks of signature authenticity. Trusted timestamp is part of a valid signature as it allows to check validity of signee certificate at the time of signing.
Adobe says:
Source of Trust obtained from European Union Trusted Lists (EUTL).
This is a Qualified Electronic Signature according to EU Regulation 910/2014.
Foxit says:
Source of Trust obtained from European Union Trusted Lists (EUTL).
This is a Qualified Electronic Signature according to EU Regulation 910/2014.
It's a better technical solution but unfortunately it's not as simple as you'd hope it to be.