When another party files a motion against you, you respond by filing a written opposition with the court before the deadline, laying out — point by point — why the judge should deny what the other side is asking for, and by serving a copy on the opposing party. That is the short version of how to respond to a motion in court. The longer version matters, because missing the deadline, misreading the legal standard, or filing something the court rejects on formatting can hand the other side a win without the judge ever weighing your arguments.
Figure Out Your Deadline First
Nothing else matters if you miss the deadline. The moment you receive a motion, find the rule that sets your response period. Federal court does not have a single deadline that covers every motion. Opposing affidavits for most motions must be served at least 7 days before the hearing. Opposition to a motion to dismiss is typically due within 14 days. Some local rules set the deadline at 21 days before the hearing date. The motion type, the court’s local rules, and any scheduling order the judge has entered all affect the calculation.
How Federal Courts Count Days
Under the federal rules, you skip the day the triggering event happened (the day the motion was served, for example), then count every calendar day after that, including weekends and holidays. If the last day falls on a Saturday, Sunday, or legal holiday, the period extends to the next business day. If the motion was served by mail, add 3 days to whatever the deadline would otherwise be.1Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 6 Electronic service through the court’s filing system does not trigger the extra days.
Count twice. Mark the date on a calendar. The clerk’s office can confirm which local rules apply, though they cannot give you legal advice about what to file.
What a Missed Deadline Costs You
The court can treat the motion as unopposed and grant it. The judge accepts the other side’s arguments without weighing any objection from you. Depending on the motion, that could mean dismissal of your case, exclusion of key evidence, or losing an entire claim. Getting a default ruling set aside is possible but hard: courts look at whether the failure was willful, whether the other side would be prejudiced, and whether you have a legitimate defense worth hearing. Simple indifference to deadlines is not excusable.
Asking for More Time
If you realize you need more time, ask before the deadline passes. A court can extend any deadline for “good cause” when the request comes in before the original deadline expires.1Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 6 A reasonable explanation and a specific proposed new date usually suffice. Contact opposing counsel first and try to get their agreement — courts are far more likely to grant a consent extension.
If you have already missed the deadline, the standard is higher. You must show “excusable neglect,” which courts evaluate by looking at the reason for the delay, how long it lasted, whether the other side would be harmed, and whether you acted in good faith.1Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 6 A few deadlines cannot be extended at all, including deadlines for renewed motions for judgment as a matter of law, motions to amend findings, and motions for a new trial.
Read the Motion for the Legal Standard It Triggers
Different motions require different things from you. A generic “we disagree” response wastes everyone’s time, including the judge’s. Before drafting, identify what the moving party has to prove and what, if anything, you have to prove in return.
Opposing a Motion to Dismiss
A motion to dismiss argues that even if everything you alleged is true, you still do not have a valid legal claim. Your job in opposing it is to point the court to specific allegations in your complaint that, taken as true, state a plausible claim for relief. You are not proving your case yet. You are showing that the legal theory holds together and that you have alleged enough factual detail to move forward. If the other side attaches materials outside the complaint, the court may convert the motion into one for summary judgment, which triggers a different standard and gives both sides a chance to submit evidence.2Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 12
Opposing a Motion for Summary Judgment
Summary judgment is where cases are often won or lost. The moving party argues there is no genuine dispute about the key facts and they are entitled to win as a matter of law.3Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 56 Your response has to do more than disagree. Point to specific evidence in the record — depositions, documents, declarations — showing that a reasonable jury could find in your favor on at least one material fact.
If you have not had enough time to gather the evidence you need, you can file an affidavit or declaration explaining why, and ask the court to defer the motion or allow additional discovery.3Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 56 The request has to be specific about what discovery you need and how it relates to the pending motion. A vague claim that you “need more time” will not work.
Draft the Response
Every response has the same basic structure: a caption at the top, a title identifying the document, the body of your argument, and a closing request. Formatting that gets rejected costs you time against your deadline.
Caption and Title
The caption sits at the top and includes the court’s name, the case number, and the names of the parties.4Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 10 – Form of Pleadings Give the document a clear title that identifies what you are responding to, such as “Opposition to Defendant’s Motion for Summary Judgment.” A descriptive title helps the judge and clerk route and process the filing correctly.
The Argument
Address each point the moving party raised, in order. Do not skip arguments you find weak. The judge may find them stronger than you do, and silence can read as agreement. For each point, explain why the law, the facts, or both undermine the other side’s position. Support every counterargument with citations to statutes, case law, or court rules the judge can verify. Avoid emotional language. Courts respond to precision.
A common mistake in self-drafted responses is writing a narrative of what happened instead of engaging with the specific legal arguments in the motion. The judge already has the factual background from earlier filings. What the judge needs now is a reason, grounded in law and evidence, to deny the motion.
The Closing Request
End with a clear statement of what you want the court to do, usually asking the judge to deny the motion in its entirety. In legal drafting this is sometimes called the “prayer for relief” or “wherefore clause.” Keep it to one or two sentences asking the court to deny the motion and grant any other appropriate relief.
Back Up Your Arguments with Evidence
A response without evidence behind it is just argument. On summary judgment especially, the court needs specific material in the record it can point to.
Exhibits
Exhibits are copies of documents that support your factual claims: contracts, emails, photographs, medical records, business records. Label each one clearly (Exhibit A, Exhibit B, and so on) and reference it in the body of your argument so the judge knows why it matters. Every exhibit must be authenticated, meaning you need to give the court enough information to conclude the document is what you say it is. The most straightforward method is a statement from someone with personal knowledge — a witness who can testify the document is genuine.5Legal Information Institute (Cornell Law School). Federal Rules of Evidence Rule 901 – Authenticating or Identifying Evidence
Affidavits and Declarations
When you need to introduce facts not already in the case record, attach a sworn affidavit or an unsworn declaration. Both do the same job: a written statement by someone with firsthand knowledge, signed under penalty of perjury. The signer must stick to facts they personally witnessed or know about, and those facts have to be the kind that would be admissible as evidence at trial.3Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 56
An affidavit requires a notary public to administer an oath and notarize the signature. A declaration under federal law does not. It just needs language stating the signer declares “under penalty of perjury that the foregoing is true and correct,” along with the date and signature.6Office of the Law Revision Counsel. 28 USC 1746 – Unsworn Declarations Under Penalty of Perjury Declarations are easier to prepare and carry the same legal weight in federal court. Courts routinely disregard statements that are vague, based on hearsay, or made by someone without personal knowledge, so be specific and stick to what the signer actually saw or did.
Redacting Personal Information
Before filing anything, check your documents for sensitive personal data. Federal court rules require that certain identifiers be partially redacted from all filings. You may include only the last four digits of Social Security numbers and financial account numbers, the year (not full date) of a person’s birth, and the initials of any minor child.7Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 5.2 – Privacy Protection for Filings Made with the Court Court filings often become public records. Many state courts have similar redaction rules, though the specifics vary.
Format, File, and Serve
Formatting
Every court has formatting rules and they vary enough that you need to check the local rules for your specific court. Common requirements cover minimum margin sizes, font type and size, line spacing, and page or word count limits. The federal rules say the same formatting standards governing pleadings apply to motions and responses.8Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 7 A response that violates those rules can be rejected by the clerk’s office, costing you time against your deadline.
Filing
Most federal courts require attorneys to file electronically through the CM/ECF (Case Management/Electronic Case Files) system.9United States Courts. Electronic Filing (CM/ECF) Some courts let self-represented litigants use the electronic system, others still require paper filing. If you file on paper, deliver the documents to the clerk’s office and ask for a file-stamped copy for your records. Either way, keep proof you filed on time.
Serving the Other Side
Filing with the court is not the same as serving the other party. You have to separately deliver a copy of everything you filed to the opposing party or their attorney. In federal court, acceptable methods include hand delivery, mail, leaving it with the clerk (if the person has no known address), and electronic service through the court’s filing system or another method the person agreed to in writing.10Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 5 In many courts, e-filing through CM/ECF automatically serves all registered attorneys, but confirm this applies in your case.
After serving the other side, prepare a certificate of service — a short document stating who was served, when, and by what method — and file it with the court. The certificate proves compliance and prevents disputes about whether the other side received your filing.
What Happens After You File
The Reply Brief
The moving party usually gets a chance to file a reply brief addressing your arguments. The reply is supposed to be limited to rebutting what you raised, not introducing new arguments or evidence that should have been in the original motion. Reply deadlines are short, often 7 to 14 days depending on local rules. Receiving one is standard procedure.
Sur-Reply Briefs
If the reply raises entirely new arguments or cites new legal authority for the first time, you may be able to file a sur-reply. Courts do not allow sur-replies as a matter of right. You have to file a motion asking permission and explain specifically what new material the reply introduced that you need to address. Some courts are receptive, others rarely grant them. Check the local rules.
Hearing and Decision
The judge may schedule a hearing where both sides present oral arguments. This is not a trial. Nobody testifies and no new evidence comes in. It is a chance for the attorneys or self-represented parties to highlight the strongest points and answer the judge’s questions. Many judges decide motions “on the papers” without any hearing at all.
The court will eventually issue a written order granting or denying the motion. Depending on the court’s workload, this could come days or months after the final brief is filed. If the motion is denied, the case proceeds. If it is granted in whole or in part, the order will specify the consequences and any next steps.
When a Cross-Motion Makes Sense
Sometimes the best response is an offense. When a party files a motion for summary judgment, you can file your own cross-motion for summary judgment alongside your opposition. A cross-motion flips the argument: instead of just defending, you are asking the court to rule in your favor on the same issues. Each side then has to address both the original motion and the cross-motion in briefing.
Cross-motions have procedural traps. Filing one does not excuse you from opposing the original motion. You still have to do both. Watch the page limits, because local rules often cap memoranda and combining an opposition with a cross-motion can eat through your allotment quickly. Check the scheduling order to make sure you are not violating a motion-filing deadline. When in doubt, file a motion asking the court for permission to file the cross-motion out of time.
What You Certify When You Sign
Every document you sign and file carries an implicit certification. Under the federal rules, your signature means you have made a reasonable inquiry and believe the filing is not for any improper purpose (such as harassment or delay), that your legal arguments are supported by existing law or a good-faith argument for changing it, and that your factual claims have evidentiary support or are likely to after reasonable investigation.11Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 11 These obligations apply equally to attorneys and self-represented parties.
If the other side believes your filing violates these standards, they can serve you with a motion for sanctions, but they must give you 21 days to withdraw or correct the problematic filing before presenting the motion to the court.11Legal Information Institute (Cornell Law School). Federal Rules of Civil Procedure Rule 11 This “safe harbor” exists so honest mistakes can be fixed without court involvement. If you do not correct the problem within that window, sanctions can include paying the other side’s attorney fees and costs. The court can also impose sanctions on its own initiative. The practical rule is straightforward: do not file anything you know is frivolous, and if someone warns you your filing has a problem, take the warning seriously.