I’ve just run into an issue with a double post of data. The issue I’m having, is that I’m sending order information to NetBilling. After about 600 order, I finally ran into a user that was charged twice, for the same product, at exactly the same time, but with a different transaction id, which of course tells me that NetBilling was treating it as two separate orders.
I’m guessing that the user had second thoughts, tried to hit the back button, and instead of backing out of the sale, he actually bought himself 2 of what he wanted none of.
This will have to be an ongoing post here, until I find the answer, which I”m sure has been asked thousands of times. For now, I’m starting with this article: