Please tell me, my situation is as follows: I have been on the territory of Thailand for a little less than thirty days (I have not been here before)

[Mikhail]

Please tell me, my situation is as follows: I have been on the territory of Thailand for a little less than thirty days (I have not been here before)

[Sergey]

Yes. If you have a 30-day stamp, you can extend it without leaving, at the immigration office for 1900 baht for 7 days.