@Lay ******
You should do as advised as practice might vary, but just to give you an overview. These are the general requirements at Jomtien immigration Chonburi;
*TM.7
*Passport
*Copy photo page passport
*Copy latest stamp in passport
*Copy visa or extension in passport
*Copy TM.6 if you have. (discontinued for all entries by air, land and sea at date)
*Receipt TM.30
*Lease contract or proof of home
*Pass-photo
*Bank statement or confirmation from your embassy
*1900 thb cash