First I'd analyze the costs. It sounds like he is not active duty now and the rate reduction would apply only for the period of active duty. Was that 30 days, 6 months, a year? Certainly it is reasonable to ask for his military orders for that period he now wants to claim. I'd be looking at the statute of limitations at the same time.
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AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell