Can I request a 30-day stamp at entry if I have a SETV in my passport?

When entering Thailand with a valid SETV (Single Entry Tourist Visa), travelers generally cannot request a 30-day visa exemption stamp. Immigration officers typically will not stamp in for a 30-day exemption if there is an unused tourist visa present. While it is possible to ask for the 30-day exemption stamp, success largely depends on the discretion of the immigration officer at the time.