You always have to use passport of entry for exit in a country that checks departures. Even Thai are faced with this issue.

I have always entered Thailand with a British passport, this time since I applied for a retirement visa my bank is French I am living in France at the last minute I changed my mind and for the first time in my life I asked for a French passport so this time I am a Frenchman for the Thai Immigration, before I was British :-) of course cannot play with that for obtaining two Visas

Kiwikenny, you entered Thailand in your NZ passport, so you have to leave Thailand on your NZ passport.

Hi

I have just had a nightmare with duel passport. I have Nw Zealand and UK passports. I had my NZ passport stolen in Pattaya by 2 guys on a bike snatched my wallety bag.

I call the Embassy in BKK and had to go there to apply for a new one.

They do not provide you with emergency one. My application had to go to NZ to be processed for a new one.

After couple weeks I had email from New Zealand to say it was ready but they could not courier it with DHL because they did not have a service in Khon Kaen were I live with my wife. I had it sent to my home address in Auckland NZ.

I was flying out on 2nd August back to NZ for short visit. I thought my UK passport would be ok to fly out of Thailand but no they needed to see entry stamp, I showed them the police report and copy of my stolen passport, they brought every thing up on the computer. I have an APEC card which allows me 90 days without visa any time.

I came back to KHON KAEN and decided to go up to Nong Khai and over the Loa border with my UK one, they would not let me out, saying you cannot use 2 passports in Thailand.

I have to produce my new NZ passport.

So my son has posted it to my.

Crazy crazy nightmare

Kiwi Kenny

Just in case, be aware of the following advice from the NZ Embassy.

"Once your old passport has been ‘cancelled’ or replaced, and you have been issued with a new passport, you will need to take it to the relevant Immigration Bureau to have the immigration visa stamp ‘transferred’ into your new passport. We advise applicants to do this at an Immigration office, and not to wait until they are at the airport."