99designs.com: Payment return without any deduction

I think, “99designs.com” is “sitepoint.com” sister website. It is providing facility of returning amount to buyer without any deduction (returning fees). Can some one guide me, how they are doing this. Because, as per my little knowledge, every merchant (paypal, authorize, moneybookers etc) takes fees for returning amount.

Can some one guide me in this regards

Thanks in advance

Some merchant accounts do refund fees if you issue a refund for a charge. PayPal refunds all but the fixed portion ($0.30) of their fees if you issue a refund, and that’s a recent change – they used to refund all fees.