The Lei Geral de Proteção de Dados (LGPD) regulates the handling of personal data in Brazil. In payments, it covers everything the checkout collects: name, email, phone, ID document, and address.

In practice, the seller needs to state what each piece of data is used for, keep only what's necessary, allow the buyer to request deletion, and not pass the database on to third parties without a legal basis.

Card data has its own, stricter rule, set by PCI-DSS: it shouldn't even pass through your server.