Last year I spent 6 months in Thailand (COVID extensions) and this year I've already spent 5 months in Thailand (60 day TR Visa + visa exempt border run) and I am planning to return for a three week trip this month. I will have been outside of the country for 2 months before I return.

I know I may get asked a lot of questions when I return so I've made sure I have the three proofs. However, I will actually be staying in my girlfriend's apartment when I return. So how can I prove I am actually staying there since I won't have a booking confirmation? Is a printed letter from my girlfriend enough? I feel like if I don't have accommodation booked that might just give them a reason to deny me entry.