@Lukas ************
Be prepared to stand any interogation at the border
You need to have the famous THREE proofs (already mentioned above but I am going to outline them for you in detail)
*** proof of CASH (no credit or debit cards or cheques) of a minimum of 20.000.- THB in Thai Baht or in another major currency
*** proof of booked accommodation for the first 3 to 5 nights after entry
*** proof of an outward flight, out of Thailand, within the 60 days you will get stamped in, regardless of the fact that you can buy yourself a 30 days extension. I suggest NO “onwardticket” (some call them “fake” tickets) but a REAL ticket, a cheap Air Asia one-way flight from Hat Yai to Kuala Lumpur for 32 USD