when you travel for business, do you keep the meal receipts, plane tickets, etc for your trip after the company has reimbursed you? If so, for how long? Do we need it for anything?
When I was turning in my expenses, I had to give them to the company as "proof". I'm not sure what they did with them. Just keep the check stub from the reimbursement check for tax purposes.
I would check with the accounting department before you toss them. Usually they are submitted for reimbursement. If the accounting people don't care, go ahead and toss them.