I voided a USPS shipping label within an hour of creating it - this was over a month ago. PayPal suggests it can take a "maximum of 21 days" to have the cost of the label refunded. A month+ later, I have yet to see this refund. I've asked about it multiple times and haven't heard anything from PayPal. It seems like others have experiences significant delays with this - how long did you wait? What did you do to ensure you received the refund?
This certainly makes me hesitant to utilize PayPal for shipping labels in the future.