Douglas Fox said:No salesperson has any legal standing to demand your last name if the vehicle doesn't require registration.!!! Aside from providing a business name for VAT purposes, they have no claim to your identity. It is common knowledge how a warranty must be structured to hold up in an American court should litigation arise! The bank account details are irrelevant here, given how many bicycles are gifted where the recipient is a completely different individual who holds no connection to the original purchaser's account.
In reality, anyone is permitted to ask for your full name. While nobody possesses the authority to demand official identification, they certainly have the right to inquire about your identity, and you retain the prerogative to decide whether or not to answer. However, if you choose to withhold your name, you effectively forfeit your ability to claim a warranty, as such protections are contingent upon meeting specific criteria. Refusing to provide a name constitutes a failure to meet those terms. If a "limited warranty" is strictly tied to the original purchaser, it becomes absolutely necessary to record the owner's name in the warranty documentation to prevent fraudulent claims. Should the bicycle be purchased as a gift, one simply records the recipient's name, which presents no complication whatsoever. In the event it is won through an NBA sweepstakes, the winner would naturally need to contact the service center to validate the warranty regardless.