What is the process for obtaining a COVID-19 visa extension in Thailand if initially granted only 15 days?

I think IF you look at the stamp in your passport you will see that it says "application for extension of stay under consideration until" and has a date on it that you go back to get the covid extension inked in.

The "two stamp process" (under consideration followed by the covid extension when that runs out) is common at many immigration offices 🙂

Do you mean the immigration office at Tha Yang in Phetchaburi province?

1. There is no area called "Petburi". What immigration office did you actually use?

2. >They granted me 15 days

If you look at your passport, you will see a stamp saying "under consideration", telling you to return in 15 days. Return to 15 days.

>They say an officer is going to come to check my place.

Who said that? For *SOME* extension of stays, an immigration officer may come to your workplace/ house to confirm you are working/ residing where you claim you're residing. This does not apply for the COVID-19 related extension of stay.

Don't forget, Thais are not native English speakers, and some Thais simply repeat the sounds without understanding what those sounds mean. "We will go to your house and check" may be something the immigration officer says to everyone who has an "under consideration" stamp, however he would have no idea what those sounds represent.