Andrew, you are correct in canceling the extension of stay (which is not a visa) before leaving. If is was simply a visa then the airport would probably be fine. You cancel at the same desk (thus same cue) for getting an extension so the line may still be long. However, once you are called, you be out really quick. You will have to leave that day by midnight or buy a 7 day "extension denied" stamp. Safe travels.

You can go to immigration and extend it by 30 days. You can do this once per entry. And as JD pointed out, you do not have a visa. You have a visa exempt entry.

As Mark said, either the "1" in "16" didn't stamp or the officer made an error. These things happen fairly often. I try to always check the stamp before I walk away from the counter. But a trip to the immigration office will get it fixed easily.

Can't speak to LHR. But I fly a star alliance airline whenever I go overseas and a one-way ticket has never been a problem for me.

Anyway, the poster is doing the best thing...call the airline and ask. 😁

The OA visa does not require the poster to make border bounces every 90 days. Just the 90 day report. Thus an out bound ticket is not required. You friend was on an O visa that requires a border bounce every 90 days.

While I don't doubt your friends experience, the poster has a 1 year multiple entry OA visa and will not have an issue.

With a long stay visa, a one way ticket will not be a problem at all.

I just get a new one at the airport when I leave. No big deal.

I should also mention that I live in BKK where they don't seem to care if you have the departure card with you for any immagration visit.

Your experience may vary.

Yes that is correct... again seasoned for 3 months.

You are right David. I was not clear about that. Thanks