reimbursement of expense

Alpa (19 Points)

10 May 2007  
one of clients is a c & f agent. he has regularly been paying service tax on his commission income.
however he manages his office by way of making various payments for rent, telephone bill, staff salaries etc. the system is such that only after he submits proof of payment is original is he reimbursed for the same by his principals.
now the department has issued show cause notice to him directing him to pay service tax on such reimbursement also

would anyone have a case or a clear opinion on the same?

alpa