Does Thai Immigration Require a Document from the Embassy to Transfer a 30-Day Visa to a New Passport?

The process of transferring a 30-day visa to a new passport in Thailand does not require a specific document from the embassy. You should bring both your old and new passports to the Immigration Office. However, note that 30-day visas are technically not issued as stickers and cannot be transferred. Instead, present both passports to the immigration officer when you need to prove your visa status.