Is it possible to partially sign a PDF document using an EDS?

Question

Electronic digital signature

Good afternoon! There was a need to make changes to it after signing the document using the EDS, namely to put down the date and number of the document, which appear later (after the document is registered in another system). Is it possible to change the document like this through some built-in PDF capabilities, or is the document always signed in full and it is impossible to make changes to it?

Answer 1

No, a valid signature, among other things, certifies that the document has not changed since the moment of signing.

Answer 2

Something is not. The meaning of the EDS is to make sure that the document will not be changed
Register another document first, then sign