I’m flying back to BKK tomorrow after 3 months in the US. I have my onward flight & 20k cash, however I’ll be staying with a friend. Will an email stating I’ll be with them, and copy of their id be sufficient for immigration, if asked?
TLDR : Answer Summary
The poster is returning to Bangkok after a trip abroad and inquires about the acceptance of an email from their friend, along with a copy of their friend's ID, as proof of accommodation for immigration purposes. Commenters suggest that simply providing the friend's address on the arrival card is likely sufficient and that additional documentations are often unnecessary unless specifically requested by immigration.