Hi. I have got some teacher colleagues returning to their home country next month. Their work extension of stays expire at the end of next month. I was told they shouldn't just let them expire but cancel them just before they leave the country as otherwise they may have a problem if they ever come back to Thailand. Is this right?
TLDR : Answer Summary
Teachers in Thailand should cancel their work permits and visa extensions at the immigration office before leaving the country, particularly if they plan to work in Thailand again in the future. Failing to do so could cause difficulties in obtaining a new work permit and extension in the future. If they leave without canceling and later return on a visa exemption, they might face issues only if they plan to apply for a work permit again.