How do I reconcile my AMEX BDA purchases?
You go to the AMEX website and click that you have indeed purchased and received all items on your purchasing history list.
Keeping track of account balances is the direct responsibility of the AMEX school or program office member. You should reconcile once per week, and you must reconcile once per month. The third business day of each month is the last day to reconcile for the previous month. It is important that you save any receipts or records of delivery, since some vendors do not maintain a list of items purchased but simply a sum total of the cost of your purchases.