Are you talking about PayPal's Return Shipping On Us program? If so, then all I can say is that I don't have any knowledge of that. I strongly recommend contacting them by going to https://www.paypal.com/returns -> click on "full terms and conditions" at the bottom of the page -> "Who should I contact if I have a question about the Return Shipping on Us service?"
Once you have clicked on the question "Who should I contact if I have a question about the Return Shipping on Us service?" an email should appear. That's where you should send your question.
