@Ste****
, she's from the US and actually bought a visa on arrival for Lao and got stamped in, but just turned around and got back on the bus to cross the Mekong without stamping out of Lao.
Its highly unlikely she'd be charged for overstay seeing as she's not stamped INTO thailand to begin with. ;O
The most they could do would be charge her with illegal entry but so many people forget to stamp into thailand at that border. Those immigration officers deal with it every day when people end up going back to the border to get stamped in once they realize they forgot to.