The process is as follows:
*All sales for your program will be sent to you for validation or cancellation (in case an order was cancelled or was never paid for)
*You will have to respond as soon as possible in order for affiliates to also be notified regarding the status of the sales.
*At the end of each month you will receive a list of all sales that you validated with the month. These are the sales that need to pay commission for affiliates.
This way you only have to pay for sales only after you have collected the money from your real customers!