You can only void a shipment after End of Day when:
UPS has received the electronic shipment data (Order Processed: Ready for UPS)
UPS has not taken possession of the shipment.
You can void shipments after End of Day from the Shipment History window.
To void a shipment from the Shipment History window:
Select the individual 1Z tracking number of the package you want to void.
On the Home tab, select Void. The Void After EOD window appears.
Click the OK button. The UPS Void Shipments Page on the Web appears for you to complete the void.
Notes:
When you void shipments from the UPS Void Shipments Page, the Shipment History window is not updated and does not indicate that you voided the shipments. To remind yourself that the shipments were voided, you can manually mark the voided shipment. See Mark or Unmark a Shipment/Package as Voided in the Shipment History Window.
If you want to void packages or shipments before you have run End of Day, see Void or Delete Shipments Before End of Day.
If a shipment is voided by mistake, you cannot "unvoid" the shipment, but you can repeat the shipment. Select the voided shipment under UPS Pickups in the Shipment History window. On the Home tab, select Repeat and then Repeat Shipment. The Shipping window displays the same shipment information, and you can process the information as a new shipment.