Sounds like the inverse of what some Asians, who have 2-letter surnames like “Ng”, have to put up with when systems expect last names to be 3+ characters. Though I don’t think that minimum restriction comes up in major govt systems.
My previous boss had a single letter last name. Turns out most airline ticketing system have a 3 letter minimum so he just entered his single character name 3 times to purchase the ticket. But this meant that every single time he got to the airport he would get stopped because his ticket didn't match his passport.
