If you are seeking justice, by all means call upon Forseti - but make sure that you are objectively being wronged, and that no part of the problem is yours to make amends for. As a god of fairness and equal exchange,
Forseti requires that you be absolutely clean in any dealings you ask him to be
a part of. He also requires that you give out equally what you have gotten
back. If a decision goes your way and gives you something, you are to give to
others the amount of goodness you have received from the decision.
Some organizations to donate to, as an offering to Forseti:
World Justice Project http://worldjusticeproject.org/
American Civil Liberties Union http://www.aclu.org/
Amnesty International http://www.amnesty.org/
Human Rights Watch http://www.hrw.org/
Witness http://www.witness.org/
The Innocence Project http://www.innocenceproject.org/
Human Trafficking Organization http://www.humantrafficking.org/
(This website has a list of countries; click on your own and find a local organization that fights human trafficking to donate to. Enslaving someone against their will and without their consent is a terrible breach of human rights, and deprives its victims of the protection of the law.)