Please ensure that Phitsanu travels with his passport and his Original Yellow Fever Vaccination Certificate. And also please ensure that Somsak pass his passport & Yellow Fever Vaccination Certificate to Phitsanu.
Preeda please help me to co-ordinate.
Its risky to carry passport, but please ask Phitsanu to be careful. Put somewhere in his hand luggage and make sure it is not put together with his own passport.
Other travelling details I will send to you later. Get him to standby.