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:
- The applicant is entitled to the relief demanded, and that relief consists wholly or partly in stopping (or requiring) the act complained of, whether for a limited period or permanently;
- The continuance or non-performance of the acts complained of during the case would probably cause injustice to the applicant; or
- A party, court, agency, or person is doing, threatening, or attempting an act that probably violates the applicant’s rights over the subject of the case, in a way that would render any eventual judgment ineffectual.
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:
- 1. File the verified application. This can be embedded in your complaint or other initiatory pleading, or filed later as a motion in a pending case. It must be verified (sworn to) and must state the facts that entitle you to the relief sought, supported by affidavits and documentary evidence.
- 2. Raffle with notice, if in a multi-sala court. Where an application for a writ of preliminary injunction or TRO is included in the initiatory pleading and the case is filed in a court with multiple branches, the case is raffled only after notice to, and in the presence of, the adverse party or person to be enjoined. That notice must be preceded or accompanied by service of summons, the complaint, and your affidavit and bond.
- 3. Ask for a TRO if the injury is imminent. If waiting for the full injunction hearing would let irreparable harm happen first, you may ask for a TRO. A judge presiding over a single-sala court, or the executive judge of a multi-sala court, may issue a 72-hour TRO ex parte (without notice) only in cases of extreme urgency where grave injustice and irreparable injury would otherwise result.
- 4. Summary hearing follows quickly. If a 72-hour TRO is issued, the judge must hold a summary hearing within that same 72 hours to decide whether to extend it. A 20-day TRO (issued upon a showing, from affidavits and the verified application, that irreparable injury would result before the matter can be heard on notice) likewise triggers a summary hearing, to be conducted within 24 hours of the sheriff’s return of service, or of the record reaching the branch where the case was raffled.
- 5. Full hearing on the injunction. No preliminary injunction may be granted without a hearing and prior notice to the party sought to be enjoined. At this hearing both sides may submit affidavits and argument on whether the writ should issue.
- 6. Post the injunction bond. Unless the court exempts you, you must file a bond — in an amount the court fixes — answering for whatever damages the enjoined party may suffer if the court later decides you were not entitled to the injunction.
- 7. Writ issues upon approval of the bond. Once the court approves the bond, it issues the writ of preliminary injunction.
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:
- A TRO issued on a showing of irreparable injury before the case can be heard on notice is effective for twenty (20) days from service on the party enjoined, with a summary hearing to follow.
- An ex parte TRO issued in extreme urgency is effective for only seventy-two (72) hours, and that 72-hour period is counted as part of, not on top of, the 20-day maximum — so the combined total never exceeds 20 days.
- A TRO issued by the Court of Appeals or one of its members is effective for sixty (60) days from service.
- A TRO issued by the Supreme Court or one of its members remains effective until the Court orders otherwise.
- If the application for preliminary injunction is denied, or not resolved within the TRO’s effective period, the TRO is automatically deemed vacated — no court order is needed to lift it, and it cannot be renewed on the same ground.
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:
- Arguing the application itself is insufficient, before the writ is even granted;
- Moving to dissolve an injunction already granted, by affidavits showing other grounds, which the applicant may in turn oppose by counter-affidavits;
- Showing that, even if the applicant is technically entitled to the injunction, continuing it would cause the enjoined party irreparable damage while the applicant could be fully compensated in damages — in which case the enjoined party may secure dissolution by posting a counter-bond; and
- Asking the court to narrow or modify the injunction if its scope is broader than necessary.
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
- Build your factual record early. Because the court decides largely on affidavits and documents at this stage, gather your strongest evidence of the right you are protecting and the specific, quantifiable harm you face before you file, rather than after.
- Be realistic about urgency. Courts scrutinize ex parte TRO requests closely precisely because they bypass notice to the other side; if the harm is not truly imminent and irreparable, expect the request for the 72-hour TRO to be denied even if the underlying injunction has merit.
- Prepare for the bond. Because the bond amount is fixed by the judge and can be substantial, have financing or a surety company lined up in advance so an approved application does not stall for lack of a bond.
- Track the clock. Because TRO periods are non-extendible by rule, calendar the 72-hour and 20-day deadlines the moment any TRO is issued, whether you are the applicant or the party opposing it.
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.