@jthole wrote:
How long are postage mailing labels good for? If I print a USPS postage label today must I mail the package today?
The question isn't so much whether the USPS will accept it tomorrow instead (they will), but whether your handling time promises same-day shipping. The Handling Time clock starts when the package is paid for, and doesn't stop until the tracking number shows an in-network scan by the USPS, indicating that they now have possession of it.
If your local PO offers a Self-Serve Kiosk (SSK) in their front lobby and your package is not too large to fit in the drop chute, then you can stop in after hours, get a Provisional Acceptance scan at the SSK, and drop your box in the chute. eBay recognizes the Provisional Acceptance scan as proof of mailing. Your PO should follow that with a real Acceptance scan when the drop chute is emptied behind the scenes.
