In a civil case, a motion, response, and reply in court are the three written filings that resolve almost every contested issue: one side files a motion asking the judge for something specific, the other side files a response (also called an opposition) explaining why the judge should say no, and the moving party gets the last word with a reply that addresses only what the opposition raised. The Federal Rules of Civil Procedure set the framework, but local court rules fill in deadlines and page limits, so your specific court’s rules control the particulars.
The Motion
A motion is a written request asking the court to do something, such as dismiss a claim, order the other side to produce documents, or enter judgment without a trial. Under the Federal Rules, every motion must be in writing (unless made during a hearing), state the specific grounds for the request, and spell out the exact relief sought.1Legal Information Institute. Federal Rules of Civil Procedure Rule 7 – Pleadings Allowed; Form of Motions and Other Papers
A motion is almost always paired with a supporting memorandum, sometimes called a memorandum of points and authorities. The memorandum sets out the legal arguments, cites statutes and case law, and explains why the party is entitled to what it is asking for. If the motion depends on facts that are not already in the court record, those facts come in through declarations, affidavits, or exhibits attached to the motion.
One strategic point matters more than most litigants realize: every argument the moving party wants the court to consider has to appear in the motion itself. Arguments held back for later are generally treated as waived.
The Response or Opposition
The response is the non-moving party’s chance to push back. It goes through the motion’s arguments point by point, explains why the court should deny the request, raises any factual disputes, and cites contrary authority. This is the opposing party’s primary opportunity to be heard, and anything not raised here can be hard to resurrect later.
Missing the opposition deadline is one of the costliest procedural mistakes in civil litigation. Many local rules let the court treat an unopposed motion as conceded and grant it without reaching the merits. Even courts that still review unopposed motions will have only one side’s version of the facts and law in front of them. Either way, the practical result is the same: a motion is far more likely to be granted when nobody responds.
The Reply
The reply belongs to the moving party and closes the briefing cycle. Its one legitimate purpose is to answer what the opposition said. It is not a second draft of the motion, and it is not a chance to add arguments the moving party forgot the first time.
Courts enforce this limit strictly. New legal theories, new evidence, or arguments that could have been included in the opening motion are routinely struck or ignored when they first surface in a reply. The reasoning is one of fairness: the non-moving party has no procedural right to file anything after the reply, so new material in the reply would deny the other side any chance to answer it.
Reply briefs also tend to be shorter than the other filings. Specific page and word limits depend on local rules, but reply briefs commonly get roughly half the length allowance of the opening motion and the opposition, which reinforces how narrow their job is.
Deadlines and Counting the Days
The Federal Rules do not set a single universal deadline for oppositions and replies. Those timelines come from local court rules, which vary from district to district. A common pattern is 21 days to oppose a motion after it is served and 14 days to reply, but local rules and the judge’s scheduling order govern. Some courts set deadlines relative to a scheduled hearing date rather than the filing date. The only reliable way to know your deadline is to read the local rules for your specific court and any applicable scheduling order.
When you have a deadline, the Federal Rules dictate how to count it. The clock starts the day after the triggering event, such as the day after being served with the motion. Every calendar day counts, including weekends and holidays. The one exception: if the last day falls on a Saturday, Sunday, or federal holiday, the deadline automatically rolls to the end of the next business day.2Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers For electronic filing, “end of the day” means midnight in the court’s time zone.
If papers are served by mail or by leaving them with the clerk rather than through the court’s electronic filing system, three extra days are added to the deadline.2Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers Electronic filing through CM/ECF does not trigger that extension because delivery is instant.
Asking for More Time
If you cannot meet a briefing deadline, you can ask for an extension. The standard is good cause, and the request has a much better chance if you file it before the deadline passes. Once the deadline has expired, the bar rises: you have to show excusable neglect, which is harder to meet.2Legal Information Institute. Federal Rules of Civil Procedure Rule 6 – Computing and Extending Time; Time for Motion Papers Judges typically grant reasonable first-time requests made in advance, especially when the other side does not object.
Evidence That Supports the Brief
Legal arguments alone will not carry a motion that turns on disputed facts. The standard way to put facts in front of the court is through a declaration or affidavit attached to the brief. Rule 56 illustrates this for summary judgment: a party claiming a fact is or is not genuinely disputed has to cite specific evidence in the record, including depositions, documents, affidavits, or declarations.3Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment
Declarations and affidavits have to be based on personal knowledge, contain facts that would be admissible at trial, and show that the signer is competent to testify about what they describe.3Legal Information Institute. Federal Rules of Civil Procedure Rule 56 – Summary Judgment A declaration filled with speculation, hearsay, or legal conclusions will be disregarded. If a party fails to properly support its factual claims, the court can treat the other side’s version as undisputed.
Evidence travels with the brief it supports. Declarations backing the motion go in with the motion; declarations responding to the opposition go in with the reply. Trying to file new evidence after briefing closes raises the same problems as new legal arguments and requires special permission.
When a Fourth Brief Is Allowed
The standard cycle ends with the reply. There is no automatic right to a fourth brief, which is called a sur-reply. One federal court put it this way: “Neither the Local Rules nor the Federal Rules provide the right to file a surreply.”4govinfo. Ahdom v. Etchebehere – Order Granting Defendant’s Motion to Strike Filing one without permission usually gets it stricken from the record.
The narrow exception is when the reply itself introduces new arguments or evidence that the non-moving party had no earlier chance to address. The burden sits on the party seeking the sur-reply to show why that exception applies.
The proper vehicle is a separate motion for leave to file a sur-reply. That request has to identify the specific new material in the reply, explain why it is genuinely new rather than a fair response to the opposition, and show why additional briefing is needed to prevent unfairness. Standard practice is to attach the proposed sur-reply as an exhibit so the judge can see exactly what you want to file before deciding.5United States Department of Justice. Plaintiff United States’ Motion For Leave To File A Surreply If leave is granted, the sur-reply has to stay inside the boundaries of the permission and address only the new material identified.
How the Judge Decides
Once the final authorized brief is filed, the judge reviews the full record: the motion, the opposition, the reply, any declarations and exhibits, and any additional authorized filings. Federal Rule 78 gives courts explicit authority to decide motions on the written submissions alone, without a hearing.6Legal Information Institute. Federal Rules of Civil Procedure Rule 78 – Hearing Motions; Submission on Briefs Most non-dispositive motions, including discovery disputes and scheduling issues, are decided on the papers. For weightier motions like summary judgment, some judges schedule oral argument to test the parties’ positions, but oral argument is discretionary rather than guaranteed.
The ruling comes as a written order granting or denying the request, sometimes accompanied by a longer opinion. The court may also grant a motion in part and deny it in part, or order additional proceedings before a final decision. How long the ruling takes depends on the judge’s caseload and the complexity of the issue, ranging from a few days for routine discovery questions to several months for summary judgment.