What is the best way to provide a vendor with proof of Military Service as it pertains to a Military discount .My Son is Active Duty and wants to order some gear online. Vendor wants a copy/photo of his Military ID .Two different Vendors asked for this "Proof" He has concerns as he is not regular ARMY. What is protocol . One is free shipping on all orders and the other is 10% off all orders . Helps a lot on Army pay. Are there any Reg's that will jam him up on this. What else could you use as Proof ?