Express Mail Corporate Account customers can charge postage and fees to one central account. Customers may deposit Express Mail shipments paid through a corporate account at any Express Mail collection box, at a Post Office™, or with a Postal Service carrier.
A special yellow-and-white “Sunday/Holiday” sticker (Label 25) will be applied to all Sunday/Holiday Delivery packages during retail transactions. Electronically generated Express Mail labels will contain the text Sunday/Holiday Delivery Guaranteed. Label 25 will also be added to these items at acceptance when possible. The sticker is 3-1/2 inches x 3 inches.