> I dunno. The former places the cognitive load on the user. The latter places no additional cognitive load on either party.
It adds cognitive load because I've not seen a system where first/last name is not a synonym for given/family name, except it also indicates the system designer is not aware of alternative ordering for names and is forcing me to decide between correct order/incorrect semantic vs. incorrect order/correct semantic, so it's always a game of guessing what the system will subsequently try to display my name as if I enter it in a certain way.
You don't have to guess. There's an ordering of your names on your ID.
Use that. I'd be surprised if if is different to the one used by your country's revenue service.
If the taxman in your country both knows who you are and has a name for you, that's the correct name, regardless of whether unspoken rules about given/family/calling names exist or not.
It adds cognitive load because I've not seen a system where first/last name is not a synonym for given/family name, except it also indicates the system designer is not aware of alternative ordering for names and is forcing me to decide between correct order/incorrect semantic vs. incorrect order/correct semantic, so it's always a game of guessing what the system will subsequently try to display my name as if I enter it in a certain way.