What steps should I take to transfer my Non-Immigrant O Marriage Visa to a new passport after traveling to Germany?

To ensure a smooth re-entry into Thailand and transfer your Non-Immigrant O Marriage Visa to your new passport, follow these steps: 1) Carry both your old and new passports when returning to Thailand, ensuring the old passport contains the visa or extension stamps. 2) Obtain a re-entry stamp before you leave Thailand to keep your visa valid. 3) Upon return, visit the local immigration office within 7 days to transfer the extension of stay or visa stamp to your new passport. If you have an extension of stay stamped in your old passport, confirm it is transferrable to the new passport.