Can I get a 30-day exempt entry stamp if I re-enter Thailand on the last day of my O-A extension?

The user plans to give up their O-A extension and seeks clarity on whether they will receive a 30-day visa exemption stamp when re-entering Thailand on the last day of their extension. Responses suggest that the decision is at the discretion of the immigration officer. Some people have reported successfully obtaining the exemption by explicitly requesting not to use their extension and providing signed acknowledgment. However, results can vary, with some officers displaying leniency and others enforcing strict rules.