Comment by yurishimo

Many states have extra markings on the card for citizens vs legal residents. A valid birth certificate would also be enough since the US is one of the only nations to recognize birthright citizenship.

Also worth pointing out that most Americans don't have passports and getting one can take anywhere from 6 weeks to 6 months.

Also, you'd have to be smoking something to assume that the three letter agencies are not going to be combing through Anthropic's customer list and assessing for fraud and foreign bad-actors. If you lie, they'll probably catch you eventually and most people are not stupid enough to lie about their identity to the US government and think they'll get away with it forever.