Our organization is basically into outsourcing skill sets. The company has opened its own individual unit as well apart from outsourcing engineers. The company has a per diem policy for both domestic and international. I have been to domestic onsite implementation for a couple of months. We were given guest house accommodation and cab facility. After finishing the implementation, I submitted the travel expense sheet. I was told that there is no per diem for our unit. I can reimburse the actuals producing the bills. Is there any provision where I can challenge?