Comment by int_19h

This is a very strange requirement, to be honest. E.g. what about foreigners whose native script is not the same, so their (pre-existing) signature is unparseable to that clerk anyway?

FWIW I have a signature that is barely recognizable as my two initials, and I have never had it rejected on such grounds in the five different countries (using two different scripts) I've had to sign documents using it.