Re-entry permits at CNX this AM. 30 minutes for 2 of us. Here is current list of documents required. Second 1 is the same as the first.
To summarize TM 18
Copy of passport personal information form page
Copy of thai visa
Copy of extension of stay
Copy of departure card - if lost dont worry they will give you a new one
TM 18must have 4x6cm photo
Copy of TM 30. This is new since I flew in June.
Best advice? Be prepared and arrive a MINIMUM of 2 hours early. If there had been others we could have ended up missing our flight.
You can get re-entry at immigration but prefer not to have my toes molested.
TLDR : Answer Summary
To obtain a re-entry permit in Thailand, the following documents are required: 1) A copy of the passport's personal information page, 2) A copy of the Thai visa, 3) A copy of the extension of stay, 4) A copy of the departure card (can be replaced if lost), 5) A TM 18 form with a 4x6cm photo, and 6) A copy of TM 30 (recent requirement since June). It's advised to arrive at least 2 hours early to avoid missing your flight.