Ray J No Show Costs Him

The SC station -- called Cox Radio -- originally sued Ray J, claiming it paid him $20,000 to MC at a local event for a couple hours ... then attend a meet-and-greet with fans for another 30 minutes.

But according to the lawsuit, Ray blew the entire thing off -- and absconded with the money.

A South Carolina judge ruled in favor of Cox radio because Ray never showed up, awarding it $25,100 -- but Ray didn't pay, so Cox took the judgment to Ray's primary state of residence ... California.