YIL (Yesterday, I learned) that, in Austria, digital signatures on documents (using a signature you can only get by verifying your identity, which can be done in person, or online but no I'm not making pics with my passport, ever) have the same value as handwritten signatures.

If someone provides you a PDF and tells you to print it out and sign it, you can just sign it on your PC and send the PDF back, and unless they explicitly told you not to do so (it can't be put in terms and conditions), they can't reject a signature provided in this way.