[pbreit]

"Original credits" have been around forever but they are typically watched pretty closely by the acquirers, processors and associations (V, MC) since they are ripe for enabling fraud. But I could imagine someone with Square's clout could work out a deal with Paymentech/First Data and/or Visa/MC (Visa is an investor).

As someone mentioned, we did this at PayPal a long time ago but it was frowned upon. We even looked at refunding prior credit card charges that were unrelated to the new payout. We'd even make money on those txns!