Question for all you QBMS users. The current module will allow multiple (duplicate) charges to occur. Intuit's recommended approach is to craft TransRequestID in such a fashion as to avoid this possibility. The consequence of doing this is that any given customer can only make QBMS charges once every 15 minutes and not more often. As mentioned, this is the recommended implementation by Intuit. Their example is - transaction is "complete" and charged, but network goes down before confirm hits customer. So customer redoes the order. Since it is a duplicate, it will reconfirm the data, but not charge again.

My personal view is to implement a hybrid approach. Craft the transaction id so that the SAME ORDER cannot be charged twice, but a new order number can be done immediately. Thoughts?