What formalities should be arranged for travel and return to Thailand with a retirement visa?

Okay, the issue is sorted, The O/P is on an "extension of stay" which is NOT a visa 😮 and they will need to buy a re-entry permit before they leave the country or they will lose their current extension

remember everyone extensions of stays are sold without ANY re-entry permit, you BUY one after you get your extension and it will be valid until your extension expires

Now as far as what you need to do to get back IN to thailand that's not a topic for this group. 😕 You would need to meet the entry requirements in place when you come back. As of right now that's an approved thai pass, proof of a minimum of 30 days 10K USD in covid insurance and your vaccination history.

What it will be when you go to re-enter thailand is anyone's guess. 😮

post here and ask your questions about getting back in

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If you look at the stamps in your passports and they say "extension of stay permitted until" and have a date on it you're not on any visa but on an extension

To leave/come back to thailand you need to BUY a re-entry permit (single re-entry 1000 baht, multiple re-entry 3800 baht) and you get them at the immigration office where you got your extensions done OR at the airport before you fly out (note they are NOT available at every international airport so check before).

You have retirement visa or one year retirement extension of stay ?