What should I do with my retirement visa when renewing my passport and returning to Thailand?

When traveling back to Thailand with a retirement visa in an expired passport, it is essential to carry both the expired passport (with the visa stamp) and the new passport. Upon arrival in Thailand, you will need to visit the immigration office to transfer your visa and entry stamp from the old passport to the new one. Additionally, ensure that you have obtained a re-entry permit to present upon returning. This process will help avoid any complications related to your visa status.