This group seems to get same/similar posts several times a day. If someone's traveling
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way around the world, and then wants to hope they get lucky vs spending a few $$ for an onward ticket, is just beyond me. As for bus tickets, I've never tried, but have read the reason IO's won't accept that, as they go to the boarder, and do not go into another country, so the ticket isn't proof of onward travel outside of Thailand, just proof you're going to a Thai boarder town.