|Conflict of laws|
|Substantive legal areas|
In the area of conflict of laws, anti-suit injunction is an order issued by a court or arbitral tribunal that prevents an opposing party from commencing or continuing a proceeding in another jurisdiction or forum. If the opposing party contravenes such an order issued by a court, a contempt of court order may be issued by the domestic court against that party.
It is often used as a means to prevent forum shopping. In recent years many jurisdictions have placed a high standard to obtain an injunction such as where the proceedings are "oppressive or vexatious". Furthermore, in proceedings where Council Regulation (EC) No 44/2001 applies to the parties, the anti-suit injunction is no longer available to assist litigation  or arbitration.
- Lévy, Laurent, "Anti-suit Injunctions Issued by Arbitrators", in Emmanuel Gaillard (ed.), Anti-Suit Injunctions In International Arbitration (Berne: Staempfli, 2005)
- Turner v Grovit (C-159/02)  1 AC 101
- Allianz SpA (formerly Riunione Adriatica di Sicurta SpA) v West Tankers Inc (C-185/07)  1 AC 1138