I did this recently at the Samut Prakan IO, so it might be different. This was for car and bike licence renewal. I learnt a lesson here. 5 years ago the Samut Prakan office insisted I needed 2 certificates, and charged me 2x 500 baht. At that time, the DLT said one certificate and a copy were ok. Fast forward to now. DLT said one certificate is enough, but expected the wording on the certificate to state both car and bike licence renewal.

Again, Samut Prakan IO insisted I needed 2 certificates. I made the mistake of insisting I only needed it for the car. This time they didn't charge anything, but I had already decided to get one certificate (my second mistake). This office issues the certificate a week later. Went back to DLT and they needed the correct wording so I only completed my car licence. Went back to Samut Prakan immigration and requested the second certificate.

Lessons learnt here. This IO has improved its practices, although one certificate with both vehicle types stated would be optimum. Another lesson learnt is that DLT can only accept a single medical certificate if the licence applications are completed on the same day. Another original is required if doing the other licence on another day.

I hope this is useful for anybody reading. There were some bemused observers during this process, myself included.

@Rob *******

If you want to be really safe, have a flexible return ticket. Having an actual tourist visa avoids these concerns.

@Rob *******

I haven't seen it mentioned in this post yet, but when you plan to enter visa exempt, you will need proof of onward travel, e.g. a return ticket. This isn't for Thai immigration, it is an airline policy, to protect themselves.

@Tod ********

I used the service last month, and it was all ok. Unfortunately immigration have a sign saying "reentry visa" when they really mean reentry permit. The TM8 info on the counter clarified this.

@Richard *******

I see, that explains it. Mine was done in 2016.

@Richard *******

I did mine in Berlin. It says HMPO. The passport was posted from the UK according to the information I had at the time.

Many years ago I made a return trip from Bangkok to Hong Kong, while on a visa waiver entry. In anticipation of being asked in Hong Kong on the way back, I had bought a train ticket to Malaysia before leaving Thailand. It all worked out exactly as expected, no problem when asked for onward journey proof.

If I were on a short trip here (I am not), I might feel it would be ok to simply leave the country before the end of the 30 days that I should have been stamped in for. After all, travellers should know the immigration requirements while planning their travel. What are your thoughts on this?

Homepro has house numbers. I made a placard a few years back, though I was working on some wood working projects at the time.

I changed my extension type last year from marriage (basis of my original non o visa) to retirement. This was at Samut Prakan IO. I asked at the time if it would be possible later to change the reason for extension to marriage, and they said yes.

It is worth noting that they will cancel your previous extension when you change the reason, and reset the extension date to the date of application. My original extension expired in November and after changing it now expires in September, so don't go too early to make the new application.