This page contains information regarding Star Trek: Discovery, and thus may contain spoilers.
In the 32nd century, the Mercantile, an Emerald Chain-operated marketplace located at Requiem, Hima, employed couriers for picking up and delivering items. Payment was in the form of dilithium. On their left sleeves, the couriers wore a piece of technology which was used as identification. In the 3180s, Cleveland Booker, Cosmo Traitt, and Zareh worked as couriers. (DIS: "That Hope Is You, Part 1", "Far From Home")