What should I do if my 12-month Non-O visa extension does not state multi-entry?

You must h. This stamp 4000thb

You got to pay for multi entrt m8 its not a thai freebie

Watch your wrong wording, John Farkas :

“hi graham it was a 15month retirement visa multi entry”

*** there is nothing such as a multi-entry Non-Imm-O Retirement Visa since October 2023.

*** ALL Retirement visas are issued as a 90-days single-entry Non-Imm-O Retirement Visa

*** You enter Thailand on this visa, you get stamped in for a 90-days stay permit. The “visa” becomes invalid after you entered.

*** this 90-days stay permit gets extended for one year. Now you got a “12-months extension of (the) stay permit based on retirement”.

This extended stay permit is not a visa. It is not a retirement visa. It simply is an “extended stay permit”.

*** for this one-year stay permit you bought a multi re-entry permit for 3800 Baht.

This re-entry permit is valid until the expiry of the stay permit it was bought for.

Check the stamps in your passport, they will tell you exactly the same.

Go to immigration , you pay for multi entry

Extensions are not multiple entry, you will need to purchase your re-entry permit separately.

All I can say is lucky you queried it before travelling overseas , otherwise your extension would have been null and void.

Purchase the Multi-entry stamp separately (different location within Immigration). Cost is 3800b to add to the 12 month extension. A 2nd separate stamp will be added to your passport

If you bought a multi-entry re-entry permit while on your 90 day Non-O Visa you wasted your money as it doesn't transfer when you get your 12 month extension of stay.

Extensions are not in themselves multi entry, you need to apply for a re-entry permit, either single re-entry or multiple (unlimited) re-entry