There are companies that are selling systems that would allow you to pay customers using a prepaid debit card. We are actually developing this option ourselves and may have this solution available down the road. I am not sure what the costs are to implement this sort of solution but one of the obstacles that we have come across are the fees associated with the cards. The end user (your customer) and the card issuer (your company) are responsible for various transaction fees. Really the main argument for using this sort of solution is this; Customers prefer cash. If your competition is paying cash, customers may be more likely to sell their materials to them.