How can I transfer my retirement visa extension and re-entry stamp to a new passport while in my home country?

The process for transferring a retirement visa extension and re-entry stamp to a new passport involves using both the old and new passports. Upon returning to Thailand on the old passport, you can visit any immigration office, including in Chonburi, to request the transfer of your visa extension and multiple re-entry stamps. It's also recommended to update your address using the TM28 and TM30 forms, as these may be required for processing.