Vendor

From Memory Alpha, the free Star Trek reference

Vendor is the homeworld of the Vendorians. It is Class M, and is the second planet in its star system. The planet, located near the Romulan Neutral Zone, was quarantined by the Federation during the 23rd century because its inhabitants were deemed psychologically unfit for participation in a community of worlds.

Carter Winston's trading vessel crash-landed on Vendor in 2264. He eventually died there in 2265, while under the care of a Vendorian who later assumed his identity. (TAS: "The Survivor")