AFAIK you're only required to give these details when your total bill exceeds a certain amount (~50,000?) and it's largely because buying gold/jewelry is a vect

AFAIK you're only required to give these details when your total bill exceeds a certain amount (~50,000?) and it's largely because buying gold/jewelry is a vector of money laundering and tax avoidance. I don't buy jewelry but ran into this recently when my mother wanted some.