Single marital certificate issue by your home town district officer in English language, sign and stamp both documents by the Thai embassy in your own country and then travel to Thailand, stamp and sign by your embassy in bkk and after that go ahead jaywatna for to submit all documents and waiting for marriage documents may be a month, fresh information I experienced 2018
Bro I don't know much but every time on my arrival they demand for return air ticket along with the hotel booking.
In case anybody don't have anything in the above mentioned requirements I don't know may be they detain the passenger for inquiry or deport but as per my knowledge if you have much cash more than 20 thousands baht then it's not a problem