What can i do if i lost my tracking number? So if you lost your tracking number, I suggest you contact the sender for help. Ask he or she offer your tracking number or call USPS courier customer service for help and demand action, but this really depends on how kind they are to help you. In a matter of fact, it is really waste time to find your tracking number from millions.Where can you check a tracking number? The process of tracking any shipment in case of USPS lost tracking number is: Visit the main site of the USPS which is www.usps.com Log-in to your USPS account. ... Go to the tab of "My USPS" which is mentioned under the left vertical menu View the dashboard. Now, you will be able to view your most recent deliveries. ... More items...Can you track a package without a tracking number? No tracking number is required. This service allows you to automatically track packages without entering an inpidual tracking number. Get email and text alerts about important shipments. See images of what's being shipped. Enter instructions for your mail carrier online, if you want to change anything about delivery.How to find an usps tracking number? Part 1 of 2: Locating Your Tracking Number