Hello,
Bills have to be submitted for any Reimbursement....especially since this involves Forex.
Are you assuming that this Director 'will' loose some bills OR is this the scenario for resolution?
Being a Director, he ought to have taken care of such minor but crucial aspects of any official travel--be it overseas or domestic.
Coming to your query about the per diem rates for different countries, Jacob has already given you the RBI guidelines.....it can be ANYTHING BUT you have to conform to these RBI norms.
Pl find below the Links [you can get more by googling if you wish to] for the Cost-of-Living Comparisions around the world. You can arrive @ the rates depending on your Company financial situation AND RBI norms.
Cost of Living Comparison Between Two Countries
Map Shows Cost of Living Around the World
Though these are actually meant for those wishing to relocate, the info can also be sued for your purpose.
Rgds,
TS