LONDON, July 20 — The injunction, an equitable remedy in the form of a special court order compelling a party to do or refrain from doing certain acts, is backed by the full coercive powers of the state. Its origins lie in Roman law’s ‘interdict’ and were refined by the English courts of equity, but its modern application—especially in the corporate world—is anything but a historical curiosity. Under the hood, it is an extraordinary remedy: a court directs conduct, and non-compliance can mean contempt, imprisonment, or monetary sanctions.
The critical technical reality is that an injunction exists only when money damages are inadequate. That is the doctrine of “no adequate remedy at law,” which sits at the heart of every application.
Equity’s sharp edge
The injunction is essentially a tool to make whole a party whose rights have been violated. But it is not handed out lightly. As ever, the detail that matters is that courts weigh the interests of non-parties—the public interest—and pay special attention to fairness and good faith.
Equitable defenses such as laches (unreasonable delay) and unclean hands (the applicant’s own misconduct) can block an injunction entirely. An injunction can be mandatory—requiring the defendant to do something, like cleaning up an oil spill—or prohibitory—forbidding an act, such as using an illegally obtained trade secret.
Many injunctions are both: they require some conduct and forbid other conduct. And the court retains the power to modify or dissolve the order if circumstances change.
In the merger room
In the context of corporate mergers, the injunction takes on a particularly strategic role. A party—whether an antitrust regulator or a private competitor—may seek a preliminary injunction to pause a transaction pending a full trial on the merits. The moving party must typically show four things: likelihood of success on the merits, irreparable harm in the absence of relief, that the balance of equities tips in its favour, and that an injunction serves the public interest.
This is a high bar, deliberately so; an interim order halting a transaction is not something courts grant lightly.
Beyond the boardroom
Different jurisdictions apply their own versions. In New South Wales, Australia, a court may issue an apprehended violence order (AVO) to someone who fears violence, harassment, abuse, or stalking. The order prohibits the defendant from assaulting, harassing, threatening, stalking, or intimidating the applicant, and may include prohibitions on contact or online searches.
Non-compliance can lead to fines, imprisonment, or deportation. In Turkey, interim injunctions are provisional relief that can compel or restrain conduct.
A Turkish plaintiff must show likelihood of success on the merits, likely severe harm without relief, and that the injunction serves the public interest—a familiar trio of tests that echoes the standard. The injunction remains, from its English equitable roots to today’s cross-border litigation, a remedy that does not merely compensate but commands. In a merger dispute, that command can stop a deal.
The detail that matters, as ever, is that the court retains ongoing control: it can modify, dissolve, or enforce the order through contempt proceedings. That distinguishes it from the declaratory judgment, which merely states the law without ordering action.
The technical reality is that an injunction is a management tool for behaviour, not just a declaration of rights. Watch for the preliminary injunction motion—it is often the first sign that a deal is in trouble, and the public interest argument will be the one that gets the closest judicial scrutiny.
