UPS return labels that will not be used should be voided within 24 hours of processing the shipment.
Within the first 24 hours, you can void a UPS return package label from your ShippingEasy SHIPMENT HISTORY page. Once 24 hours has elapsed, you will need to contact your local UPS customer service office for assistance voiding a UPS return label.
UPS from ShippingEasy One Balance
To recieve a refund for a UPS from ShippingEasy One Balance return label, you must cancel the label in the first 30 days after a label is created. Unscanned, cancelled labels will immediately be issued of refund to the Stamps.com account. You do not need to wait for UPS to review.
If the label was scanned or used, no refund will be issued.