Posicar was the homeworld of the replitian Posicarians.
In 2379, a delegate from Posicar met with the Mentor Kiv on Thoros-Beta. (TV: Mindwarp)
Behind the scenes
In a deleted scene, Kiv mentions that Posicar has never been noted for the quality of its seaweed.
Additionally, in the novelisation, there is no Posicar, and Kiv meets with avian Sondlexian board members of the Sondlex Corporation.