Hello, do you know if baby 5 month old need visa? My baby came in Thailand with Italian passport and visa, once here we did thai passport (father is Thai) but now We need to go back and he need to use Italian passport...and I forgot his visa ended 2 months ago... please let me know if you know something about it, thanks
TLDR : Answer Summary
A 5-month-old baby needs to use the Italian passport for exit from Thailand due to the entry stamp being in that passport. Although the visa expired 2 months ago, the baby may receive an overstay stamp but typically will not incur a fine. Upon returning to Thailand, the baby can enter with the Thai passport, but if traveling by air, either passport can be used at arrival.