How do I transfer my DTV to a new USA passport and what is the process for renewal in Thailand?

When renewing a U.S. passport in Thailand, expatriates can go to the U.S. Embassy in Chiang Mai, which typically processes passport renewals by mail within approximately three weeks. It is advisable to carry both the old and new passports when traveling, as the old passport containing the DTV (Dependent Visa) should remain with you for the duration of the visa. While entry stamps can be transferred to the new passport, the DTV status itself cannot be directly transferred; valid procedures should be followed for maintaining visa status after receiving the new passport.