Quick answer

You apply for a writ of preliminary injunction by filing a verified application — in your complaint or as a motion in a pending case — showing a clear legal right and the threat of irreparable injury, then posting a court-fixed bond; the court must generally give the other side notice and a hearing before issuing the writ, though a short 72-hour TRO can be issued ex parte in truly urgent situations.

A writ of preliminary injunction is obtained by filing a verified application — either inside your complaint or as a separate motion in a pending case — showing a clear right that needs protection and the threat of serious, irreparable injury while the case is being decided. The court cannot issue the writ without first giving the other side notice and a hearing, though a short-lived temporary restraining order (TRO) can be issued ahead of that hearing in genuinely urgent situations. You also have to post a bond before the writ is released.

What a Preliminary Injunction Actually Does

Under Rule 58 of the Rules of Court, a preliminary injunction is a provisional order issued at any point before final judgment, directing a person, court, or agency to stop doing something (a prohibitory injunction) or, less commonly, to perform a specific act (a preliminary mandatory injunction). It is not a final ruling on who is right — it simply freezes the situation, or forces a limited action, while the main case is litigated. Courts treat it as an extraordinary remedy, granted only when the applicant makes a clear showing under the rule, not merely because a party feels wronged.

It can be issued by the trial court where the case is pending, by the Court of Appeals or any of its members if the case (or a related petition) is there, or by the Supreme Court or any of its members.

The Three Grounds You Must Establish

Rule 58, Section 3 allows the writ only when the applicant establishes one of the following:

In practice, this boils down to three things a judge will look for: a clear and unmistakable legal right, an urgent necessity to prevent serious damage, and proof that ordinary money damages later on would not adequately undo the harm.

Step-by-Step: How the Application Is Filed and Heard

The procedure under Rule 58 generally moves through these steps:

How Long a TRO Lasts

The timelines are fixed by the rule itself and courts do not have discretion to extend them beyond these caps:

Costs: Filing Fees and the Injunction Bond

Two separate costs come with an injunction application. First, ordinary filing fees apply to the underlying case or to the application itself, computed under the court’s fee schedule; these vary depending on the nature of the action and, where applicable, the value of the subject matter, so the exact amount is best confirmed with the Clerk of Court where you are filing. Second, and distinctly, is the injunction bond — an amount the judge sets case by case, meant to cover whatever damages the party you are seeking to enjoin might suffer if it later turns out you were not entitled to the writ. Courts have discretion to waive the bond in limited situations, but this is the exception rather than the rule, and applicants should budget for it as a real, often substantial, cash or surety cost separate from filing fees.

Grounds to Oppose or Dissolve an Injunction

The rule is not one-sided. A party facing an injunction (or TRO) application can challenge it on several fronts:

A party who posts a bond and later has the injunction dissolved, or who is later found not to have been entitled to it, may also be pursued for damages under that bond, so both sides have real financial exposure tied to how the application plays out.

Practical Tips Before You File

Frequently Asked Questions

What is the difference between a TRO and a writ of preliminary injunction? A TRO is a short, emergency order meant to preserve the status quo only until the court can hold a hearing on the injunction itself; a writ of preliminary injunction follows a full hearing with notice to the other side and can remain in effect throughout the case.

How long can a TRO last? A TRO issued on a showing of irreparable injury before the case can be heard on notice lasts twenty days, a TRO issued ex parte in cases of extreme urgency lasts only seventy-two hours (counted within that same twenty-day cap), a Court of Appeals TRO lasts sixty days, and a Supreme Court TRO lasts until the Court orders otherwise.

Do I always need to post a bond to get a preliminary injunction? Generally yes, unless the court exempts you; the bond amount is fixed by the judge and is meant to cover the damages the other party may suffer if the injunction is later found unwarranted.

Can a court issue a preliminary injunction without notifying the other party? No. A preliminary injunction itself always requires notice and a hearing; only a short ex parte TRO, issued in cases of extreme urgency, can be granted without prior notice to the other side.

This commentary is for general informational purposes only and does not constitute legal advice. For guidance specific to your situation, please consult a licensed attorney.

Because the deadlines here run in hours and days rather than weeks, most of the work happens before you file, not after.