I bought a shipping label on Ebay on February 17 (TX to VA), but then I found that this label number (9405508105462485406828) had been used as early as February 15 (From the USPS website, you can find this number from GA to MI), so the shipping label I bought was invalid. I tried to cancel the original shipping label on Ebay and get a refund, but the system showed that the label had been used and could not be canceled. I contacted EBAY multiple times but the automated responses from EBAY did not...

Ebay sold me a used shipping label number | Ask a Mentor

Ebay sold me a used shipping label number | Ask a Mentor | eBay Community