For the rental agreement for 1 year in Thailand. What exactly is needed? Just a lease agreement or do we need the official immigration paper like when we extend our visa at the Thai embassy.
TLDR : Answer Summary
When renting a property in Thailand for 1 year, one primary document needed is the rental agreement. There is no specific requirement for an official immigration document at the time of signing the lease, but such documents (like those needed for visa extension) may be relevant later when applying for visa extensions at the Thai embassy.