The Goblin court is part of the Unseelie Court . The goblins are considered the foot soldiers of the Unseelie in war.
The goblin throne is ruled through might and passes from one ruler to the next through battle not by inheritance.
As goblins are considered savages by most other fey, very few have taken time to learn their customs and laws.
A Kiss of Shadows
Meredith used the custom of blood and flesh to bargain an alliance with the Goblin Court for six months.