If they are refused entry at the airport they can't do a border run because they won't be let in. In reality they will breeze through immigration get a 30 day visa exemption stamp & then (as previously explained) go to Immigration & get a 30 day extension for 1900 baht
Pongpaka Kaewprasong I am in Savannakhet now. Today I gave copy of Thai wife ID & blue book , copy of Thai marriage certificate, (also have to show original) copy of my passport , 2 photo (passport size) application form.& 5,000 baht. Staff checked paperwork , gave receipt & said come back tomorrow for 1 year M/E visa & collect passport. Very quick & very easy (Thai wife has to sign all copies with her name on)
If its a return ticket the airline won't question the lack of visa. If asked just say you are planning to tour SE Asia & are using Thailand as a start/end point
Tod , do you know if the rule about staying in Malaysia overnight that is being applied at the southern borders , is this for all visa types or just the 30 day visa exemptions
If he has an onward ticket to Vietnam boarding in Canada won't be a problem. The airline only refuse boarding if there is a possibility Thai IO will refuse entry. An onward ticket to SE Asia in fine , it doesn't have to be to country of origin
The AirAsia ticket to Mukdahan flies to Nakhon Phanom. The AirAsia minibus is parked out front and is a 90 minute transfer. Drops off/picks up at the Grand Hotel, Mukdahan. If staying , I would recommend here , 800 baht & good size rooms with usual mod cons. Did it last month, made the journey simple and didn't have to worry about missing the pick up