There is an immigration office, a few metres away from the pier to koh mak in Laem Ngop, Trat. The border to Cambodia, had lek, is about an hour and a half drive from the pier. With regards to extension etc, I will leave up to the pros ;)

Keep both passports together

@Benjamin *****

not necessarily. It depends on where they got married. If they got married in another country, they could use that marraige certificate as long as it is translated into thai or english. Best would be to speak to the Royal Thai Consulate in HCMC. They are very helpful

Hat lek crossing is quite easy, and close to koh chang. Cost was around 2000 baht

@Tod ********

the letter has to be hand written, and in Thai. I had typed out the letter in english, and they did not accept it, rightly so!

@Sam *****************

welcome. It would be best if you contact the Embassy and ask them for the latest list of documents required. You never know, something could have changed!;)

A hand written letter by your wife, photocopy of your passport and passport photos

HCMC staff are very helpful. No long queues also

David that must have been fun!!

@T**

, thanks for your help. It is easier for me to get a non o from Savannakhet or hcmc. I've been to immigration 3 times already, to get a list of docs required for the extension of stay. I was given, on The three occasions, a printed out in Thai! My wife does speak English, but sometimes it is difficult for her to explain correctly. So, I'm presume that I would be coming and going to immigration a couple of times before they accept my application for the extension of stay. Much easier to get another 1yr me non o from Laos or HCMC