Geo. T

Does Mr. A. look quite a bit older than 29? Perhaps not only his currency was fake? Will he be paying his fine in Euros? 50s and 500s?

Why would you think the poster is fake? It seems likely it was made by his friend or his family, and they put the information in, so it's not quite up to official standards ie metric or Imperial. Also, if it was made by a friend or family member when they say to contact British police, they might mean to contact British, not try and contact Thai police.

If he needs to get away from all the attention, I hear that Vanatu is having a great sale on passports.