If, within the return period and in accordance with the return conditions authorized by the seller or merchant, for items entirely paid using your PayPal account, You decide, for whatever reason, not to keep said items and to return them to the seller or merchant, You may issue refund request of the shipping costs (hereinafter: the "Refund request”) related to that return.
For the details of the requirment of your refund request, please go to the following link:
https://www.paypal.eu/returns/generalconditions/