Why isn't DHL GlobalMail working?

DHL GlobalMail can be confusing because sometimes the “tracking number” they show at the top of the page is not actually a tracking number. If you try entering it in their own form you’ll even get an error there. If you look at the bottom of your tracking page you’ll see a “DHL GM” and a “Customer Confirm” number—try using one of those. It should work correctly with at least one of them.