I have a double entry tourist visa and entered Thailand by air for the first arrival and of course now have a stamped departure card. I plan on taking a visa run bus to Cambodia to do the second entry. For an overland exit and entry, will they take my old card and then require a new arrival departure card to be filled out before entering Thailand at the land border crossing (OR) will I need to keep the same card?

Thanks!

They will take your old TM-card on departure and give you a new card to fill in on arrival.

They will take your old TM-card on departure and give you a new card to fill in on arrival.

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I'm sure this has been asked and answered, but I thought I'd ask anyway. Is there any detriment to doing your 30 day visa runs by air and going through airport immigration vs. border immigration? Are they any stricter for 30 day stamps at Don Muang than at the border control points?

If you do not have an onward air ticket within the allowed 30 days the airline could refuse to let you board to Thailand. If that is not a factor there is no reason not to use air travel.

The rules are the same.

But at the airport you will be just one other traveller to the immigration officer, arrivinng from an overseas-trip, whereas at the landborders they know the busload arriving is doing a border run, returning after 20 minutes having been abroad.

Great, thanks guys. I always have a spare onward just in case, though it has yet to come up in three incoming flights (yeah, not exactly a large sample).