This is a hilariously harmless “fucked around and found out” story.

(edit to add alt text)

@neurovagrant The legal criteria for a valid signature (as part of the form "in writing") are pretty specific in Germany: a rendering of the name with at least some recognisable characters.

However, in the US, at least the Uniform Commercial Code: https://www.law.cornell.edu/ucc/1/1-201 defines "Signed" as "includes using any symbol executed or adopted with present intention to adopt or accept a writing .", i.e., also execution by mark.

§ 1-201. General Definitions.

LII / Legal Information Institute

@neurovagrant But anyway, I doubt there is any legal requirement that the signature has to match the sample on the driver license.

Aren't mortgage papers anyway notarized? So the notary should know what a signature is.