How can I obtain a multiple entry visa for Thailand?

@Delphine *********

right, same place you went to get your yearly extension :)

You need copies of the data page of your passport, your original visa, your extension and your departure card along with a filled out TM8 application for a re-entry permit and a passport size photo.

@Delphine *********

Once you get your year extension inked in you go to section C-2 at Chaengwattana and BUY a re-entry permit. You don't get one automatically because you're already IN thailand.

OR

You can buy one at the airport when you fly out

@Delphine *********

you are confusing the extension and the re-entry permit your extension should look like this

Thanks, just to make it clear, you have a new stamp with in the second line Extension of Stay is permitted up to .. Jun 2020. You can apply at your Immigration Office for a Re-Entry Permit, this permit will be valid till the same date as .. Jun 2020 and with this permit you get on entry the same date as ..Jun 2020 stamped as Admitted until in your passport. The Re-Entry Permit can be bought as Single for 1,000 Thb or multiple for 3.800 Thb. Example of single re-entry permit: