For some years I've held a London-issue Non-O based on marriage. My wife and I are based in the UK but I enter Thailand at least once every two months (work and/or holiday) but so far never stay more than 90 days.

 

Later this year I will be taking early retirement. Our lifestyle will be something like....

1. 3 months at my wife's house in Udon.

2. 6 months in Jomtien

3. I month holiday (maybe elsewhere in Thailand or somewhere in SE Asia).

4. Two months in UK.

 

We will consider Udon to be our base.

 

I will get a marriage visa rather than retirement - because I've had several offers of work and may take up one of the offers.

 

Which immigration office would be best to use?  And when I am away from that office do I have to make a postal/online report to it, or can I just report to the nearest office?

I doubt it makes much difference, but using your wife's house/base would probably be favourite.

 

You need to take into account the 1 month 'under consideration' period if you apply based on marriage. So if you use Udon you need to time your annual renewals during the 3 month window to allow for the 1 month period between application and being granted the extension. You could renew at either office as long as you use a local address.

 

Use online reporting if you can. It doesn't work for everyone. If you report by post you can report from anywhere, but need to send it to the office you applied for the extension from, and enclose a self addressed envelope back to your registered address. You could report in person at the other office but would, usually, need to make a formal change of address first.

11 hours ago, HauptmannUK said:

Which immigration office would be best to use? 

I would choose Udon over Jomtien. They can make it difficult at Jomtien to get an extension based upon marriage from reports I have seen.

Thank you very much. We'll go for Udon.