What do I need to open a bank account at Kasikorn Bank in Thailand with a retirement visa?

To open a bank account with Kasikorn Bank while holding a retirement visa in Thailand, you typically need your passport, retirement visa, and TM30 documentation. Some branches may also require a document proving your residence, like a lease agreement or a residence certificate from immigration. It's advisable to bring your US tax ID and a Thai SIM card registered in your name for verification. Note that requirements can vary by branch, so it may be beneficial to check with different locations.