Where do I find the tracking number that was issued when I used your Mail-A-Letter feature?

In order to view the shipment history of any Mail-A-Letters and to obtain tracking numbers, login to your account at https://my.travelingmailbox.com and click Forwarding on the left hand menu, followed by the Letter History link in the center left column.

Alternatively, when a Mail-A-Letter is completed, a tracking number will be issued and sent to your email.