Will I face issues entering Thailand if my return flight exceeds the duration of my SETV?

The question concerns entering Thailand on a Single Entry Tourist Visa (SETV) while having a return flight scheduled for a date that exceeds the visa's validity. Responses indicate that the SETV permits a maximum stay of 90 days, and potential issues may arise at passport control where proof of onward travel could be requested, particularly for first-time visitors. Although having a visa may mitigate the need for a return ticket, previous travel history in the immigration system could affect entry.