Hi Shopdrop,
Sometimes the payment policy is in the shopper's contract, under FAQ's (Bestmark), or somewhere within the website for the MSC. When all else fails, you can send an email to the scheduler or the help email address and ask your question. If they pay by PayPal you should know when they pay when you give them your PayPal account info. Sometimes you just have to click around the website to find the info. Good luck!