Opposition papers are the documents you file to argue against a motion the other side has brought in your case. A complete opposition in federal court has three pieces: a sworn affidavit or declaration laying out the facts, a memorandum of law explaining why the motion should be denied, and exhibits that back up what you say happened. You must serve those papers on every other party and get them on file before the court’s deadline, which in federal civil cases means at least seven days before the hearing on the motion.1Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers
The Three Documents You Need to Prepare
An opposition package is built from three parts that do different work. Leave one out and the whole filing weakens.
The affidavit or declaration is a sworn statement from someone with firsthand knowledge of what happened. Organize it chronologically, with each factual claim in its own numbered paragraph, and keep legal argument out of it. Every assertion needs to be something the signer could testify to in court. Reference each exhibit by label where you mention it, using language like “a true and correct copy of the contract is attached as Exhibit A.”
The memorandum of law is where the legal argument lives. It cites statutes, case law, and procedural rules to explain why the motion fails. Follow the moving party’s argument order so the judge can line up the two sides point by point, and address every argument they raise. An unchallenged argument reads as a concession.
The exhibits are the documents that prove the facts in your affidavit: signed contracts, emails, text messages, dated photographs, bank statements, financial records. Label each one and reference it in the affidavit so the judge can follow along.
Federal Rule of Civil Procedure 7 requires any request for a court order to be in writing and to “state with particularity the grounds for seeking the order.”2Legal Information Institute. Federal Rules of Civil Procedure Rule 7 – Pleadings Allowed; Form of Motions and Other Papers Oppositions are held to the same specificity standard. Vague objections that don’t identify disputed facts or applicable legal standards will not move a judge.
How Long You Have to Respond
In federal civil court, opposing affidavits must be served at least seven days before the hearing.1Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers The moving party has to serve the motion at least 14 days before the hearing, so you’re left with roughly a week to draft and serve a full opposition. Mailing time or scheduling quirks can shorten that window further.
If you were served the motion by mail or by leaving papers with the clerk, add three days to your deadline.1Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers Electronic service does not trigger the extension. State courts and individual judges often set their own briefing schedules, so check the local rules and any scheduling order the judge has issued before relying on the federal default.
What Happens If You Miss the Deadline
Not filing an opposition is not an automatic loss, but it comes close. In federal court, even a complete failure to respond to a summary judgment motion does not entitle the moving party to a default win. The court still has to decide whether the movant met the legal standard.3Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment In practice the judge can treat the facts in the motion as undisputed when no one contests them, and that usually produces the same outcome.
Courts can also dismiss a case with prejudice as a sanction for ignoring motion deadlines, particularly after a warning. If you miss a deadline and want the court to consider a late opposition, you’ll need to show “excusable neglect,” meaning the delay wasn’t caused by indifference or carelessness. Judges weigh the length of the delay, prejudice to the other side, and whether you acted in good faith. Forgetting or being overbooked is not enough.
Drafting the Affidavit
Treat the affidavit as a factual record, not a persuasive brief. One point per numbered paragraph, organized by date, with each exhibit referenced where it belongs. Keep opinions and legal conclusions out. The moment you start arguing why the law is on your side, you’ve drifted into the memorandum’s job and undermined the affidavit’s credibility as evidence.
You do not need a notary in federal court. Under 28 U.S.C. ยง 1746, an unsworn declaration signed under penalty of perjury carries the same weight as a notarized affidavit.4Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury The declaration must include the exact language “I declare under penalty of perjury that the foregoing is true and correct,” along with the date and your signature. Many state courts accept declarations too, but some still require notarization, so check before you sign.
Drafting the Memorandum
Address every argument the moving party raises, and structure your memorandum in the same order they used so the judge can compare the two side by side. Cite specific statutes and case law instead of making general appeals to fairness. If the movant’s cases can be distinguished from your facts, spell out exactly how. If a more recent decision undercuts their authority, lead with it. Keep the writing direct and avoid long block quotes from opinions the judge has already read.
Formatting and Length Limits
Most courts cap the length of memoranda. Federal district courts commonly limit opposition briefs to 25 pages, though this varies by local rule. Some count words instead, usually around 8,000 to 10,000. Reply briefs are shorter, often 10 to 15 pages. Exceeding the limit without advance permission gets your brief rejected or the extra pages struck.
Standard formatting is 12-point type in a typeface like Times New Roman, double-spaced, with one-inch margins. Every document needs a caption with the case name, case number, assigned judge, court division, and a title identifying what it is, such as “Memorandum of Law in Opposition to Defendant’s Motion for Summary Judgment.” Number every page.
Redact Sensitive Information Before Filing
Scrub your documents for personal data before anything goes on the record. Federal Rule of Civil Procedure 5.2 requires that filings containing certain identifiers show only partial information:5Legal Information Institute. Federal Rules of Civil Procedure Rule 5.2 – Privacy Protection For Filings Made with the Court
- Social Security numbers and taxpayer ID numbers: last four digits only
- Birth dates: year only
- Names of minors: initials only
- Financial account numbers: last four digits only
The clerk will not check your filings for compliance. Redaction is your job. Filing an unredacted document waives privacy protection for your own information, and if you expose someone else’s data, you can face a motion to restrict access along with other remedies from the person whose information was disclosed. When in doubt, file the full version under seal and submit a redacted version for the public record.
Filing and Serving the Papers
Most federal courts require electronic filing through the Case Management/Electronic Case Files (CM/ECF) system.6United States Courts. Electronic Filing (CM/ECF) Many state courts run their own e-filing platforms. Self-represented parties without e-filing access should check whether paper filing at the clerk’s office is still allowed. There is generally no separate fee for filing an opposition; the initial case filing fee covers subsequent motion practice.
You also have to serve a copy on every other party. Federal Rule of Civil Procedure 5 allows several methods for papers filed after the complaint: handing them to the person, leaving them at the person’s office with someone in charge, mailing them to the last known address, or sending them electronically to anyone registered for the court’s e-filing system.7Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers Electronic service through CM/ECF automatically reaches every registered party, so no separate step is required.
Any time you serve by a method other than the court’s e-filing system, you must file a certificate of service showing the date and method of delivery.7Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers If you used a private delivery service and can’t confirm the exact delivery date, listing the date you handed the papers over is generally sufficient. Keep every receipt and proof of mailing. Without a valid certificate of service, the other side can claim they never received your papers, and you’ll have no record to show otherwise.
When to File a Cross-Motion Instead
If you want relief of your own, not just denial of the other side’s motion, a cross-motion goes in alongside your opposition. It’s a separate motion with its own notice, memorandum, and supporting papers, filed and served at the same time, so the judge decides both requests on the same factual record. In the summary judgment context, Federal Rule 56 even allows a court to grant judgment for the non-moving party, sometimes without a formal cross-motion, after giving notice and a reasonable time to respond.3Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment
If you need more discovery before you can properly oppose a summary judgment motion, Rule 56(d) lets you submit a declaration explaining why, and the court can defer the motion or allow time to gather additional evidence.3Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment That request is often more effective than a thin opposition filed with incomplete facts.