How do I transfer my visa to a new passport in Thailand?

To transfer your visa to a new passport in Thailand, visit the immigration office where your visa was issued, bringing both your old and new passports. If your visa label is in the old passport, it cannot be transferred; instead, keep both passports until the visa expires. If you have an extension of stay stamp, return to the issuing office for transfer, usually at no cost. Make sure to copy all pages of your old passport and check with your bank and driving license authority to update your information accordingly.