Asking on behalf of someone else: A friend arrived on a 30-day visa exemption, then extended it for another 30 days. He made a mistake booking his ticket out of Thailand, so in total he'll be in the country for 61 days, not 60 as legally allowed.
He knows he can request an additional extension that will be denied, giving him an extra 7 days to leave. His question is: will that 7-day deadline be stamped anywhere on his passport, and will it cause him any problems if he wants to come back to Thailand?
TLDR : Answer Summary
A friend was in Thailand on a 30-day visa exemption, extended once for another 30 days, leading to a total stay of 61 days. He asked if requesting an additional extension would cause issues. Responses indicate that requesting a denied extension will result in a stamp on his passport for an additional 7-day extension. Generally, this stamp does not lead to significant negative consequences when returning to Thailand, and minor overstays (under 24 hours) are typically waived at certain airports.