A foreigner can open a bank account at Bangkok Bank, but the process is subject to specific documentation requirements that verify your legal status in Thailand. While policies can occasionally vary by branch, the standard requirement is to present a valid passport and proof of long-term legal residency. This typically means holding a non-tourist visa, such as a work permit, a retirement visa, a marriage visa, or a long-term education visa. In addition to these documents, banks often request proof of address in Thailand, such as a formal lease agreement or a residency letter issued by the local immigration office. Because banking regulations regarding international anti-money laundering and Know Your Customer (KYC) standards are strictly enforced, the bank must thoroughly vet your identity and residency. It is highly recommended to visit a branch with your complete documentation, and possibly a Thai-speaking acquaintance, as the discretion to approve an account opening ultimately rests with the individual branch manager, who will evaluate whether you meet the bank’s internal compliance criteria.