Do you provide tracked shipping?
All packages we send out have a tracking number. The United States Postal Service is usually fairly good at scanning packages in along the way, but don’t panic if your package goes a couple days without an update; sometimes they forget to scan them.
International shipments also have a tracking number, but postal services in different countries vary on how often or if they scan packages. At the very least, you should be able to see when a package leaves the US, en route to your country.