On retirement Visa and taking trip to Singapore.  I’m advised need a re entry permit so no issues

upon return. Flying Thai Smile from Udon Thani to BKK for transfer to Thai Air on to Singapore. 

 

When should I get the re entry permit? And where? 

 

Last time I took this flight when you land in BKK they walk you to the area for Intl flight. 

Retirement extension??
apply at any immigration office, cost 1,000 baht/entry

or  at the ariport before u fly out,  At DM its AFTER immigration.

If you dont have a re entry permit ur extension is finished and u will need start over.

11 hours ago, DJ54 said:

On retirement Visa and taking trip to Singapore.  I’m advised need a re entry permit so no issues

upon return. Flying Thai Smile from Udon Thani to BKK for transfer to Thai Air on to Singapore. 

You need to get the re-entry permit before starting you trip. You can apply for it at the immigration where you got your extension of stay based upon retirement (it is not a visa).

Looking at the itinerary you will not have a chance to get one while at Suvarnabhumi unless your transit through means leaving the domestic flight arrivals area and going through departure immigration.