When ridiculing the dystopian mess that is the “social credit score” system in China it is good to always remember that it is called like that because it was based of the “credit score” system used in many libertarian countries, where it is regularly used to deny access to essentials of societal life, like housing, energy, and communication.
Well here is where my PhD in tracking stuff on paper, which gets handed out in triplicate to every German child at birth, comes in handy. The signature line customarily includes the date again because printing date and signing date (and thus validity) might differ. And yes, I know this is not applicable in a restaurant (hopefully), but that’s generally the reason when it occurs.