Justice, originally Card VIII, has been associated with number XI with the global success of the Rider Waite system. It is the card of fair decisions, balance and legal matters.
Harsh but fair, this card speaks of cosmic justice as well as human justice. Everything gets what they deserve in the end. Bad actions lead to inevitable punishment.
It is the card of official and legal matters. Contracts are signed, conflicts are settled.
When this card closes a spread, it almost always guarantees that the sitter will get what they want, no matter how many obstacles they will face.