A case caption on legal documents is the heading at the top of every court filing that identifies the court hearing the case, the parties, the case number, and the type of document being filed. Federal Rule of Civil Procedure 10(a) requires every pleading to carry a caption with these elements, and nearly every state court system follows the same framework.1Cornell Law School. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings Without a caption, a document has no way to be matched to the right file.
What a Case Caption Contains
The specifics shift slightly between courts, but the core pieces are consistent.
- Court name. The full name of the court hearing the case, such as “United States District Court for the Northern District of Illinois” or the equivalent state court name.
- Party names. In a civil lawsuit, the plaintiff and defendant are listed and separated by “v.” The initial complaint must name every party; later filings can name the first party on each side and refer to the others generally.1Cornell Law School. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings
- Case number. A unique docket number assigned by the court clerk when the case is filed. It tracks every document in the case and is how courts, attorneys, and parties locate filings in the record.
- Document title. What the specific filing is: “Complaint,” “Answer,” “Motion to Dismiss,” “Order.” Rule 10(a) also requires a Rule 7(a) designation on pleadings, meaning the document has to state which type of pleading it is.1Cornell Law School. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings
If you’re representing yourself, the caption carries added expectations. Courts generally require self-represented filers to include their full name, mailing address, and phone number either within the caption block or directly beneath it. An attorney’s filing shows the same contact information for the law firm.
Essentially every document filed with a court carries a caption: the complaint or petition, the answer, counterclaims, every motion, and the court’s own orders and judgments. Supporting materials like affidavits, declarations, and exhibits include a caption header linking them to the main proceeding. Discovery documents follow the same convention. Interrogatories, requests for production, and deposition notices all bear a caption. Informal letters to the court sometimes lack a formal caption, though even those typically reference the case number and party names.
How Captions Change by Case Type
The basic structure stays the same, but party labels and formatting shift with the kind of proceeding.
Civil Cases
The standard civil caption lists the plaintiff on one side and the defendant on the other, separated by “v.” The initial complaint must name every party. In later filings, you can name the first party on each side and add “et al.” to cover the rest.1Cornell Law School. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings
Criminal Cases
In a criminal case, the government is always the prosecuting party. A federal criminal caption reads “United States v. [Defendant].” At the state level, it typically reads “State of [State] v. [Defendant]” or “People of the State of [State] v. [Defendant],” depending on the jurisdiction’s convention.
Bankruptcy Proceedings
Bankruptcy captions have their own requirements under Federal Rule of Bankruptcy Procedure 1005. The caption must include the debtor’s name, employer identification number, the last four digits of the debtor’s Social Security number or individual taxpayer identification number, any other federal taxpayer identification number, and all other names the debtor has used within the eight years before filing.2Cornell Law School. Federal Rules of Bankruptcy Procedure Rule 1005 – Caption of Petition and Title of the Case The truncated Social Security number reflects privacy concerns while still allowing the court to verify identity.
“In Re” Proceedings
Some cases don’t have opposing parties in the traditional sense. Bankruptcy petitions, probate matters, guardianship proceedings, and certain regulatory actions use the “In re” format, which translates roughly to “In the matter of.” The caption reads “In re [Name or Subject]” instead of listing a plaintiff versus a defendant, signaling that the case involves administration of a person’s estate, assets, or legal status rather than a two-sided dispute.
Appeals
When a case moves to an appellate court, the caption changes. The appellate court’s name replaces the trial court’s name. The party who lost below and filed the appeal becomes the “appellant”; the other side becomes the “appellee.” These designations are typically hyphenated with the original trial-court label, so a defendant who appeals becomes the “Defendant-Appellant.” Federal Rule of Appellate Procedure 32(a)(2) requires the front cover of an appellate brief to include the case number, the appellate court’s name, the case title, the nature of the proceeding, and the identity of the court below.3Cornell Law School. Federal Rules of Appellate Procedure Rule 32 – Form of Briefs, Appendices, and Other Papers Parties who didn’t appeal and aren’t subject to the appeal keep their original trial-court designation.
Privacy Limits on What Appears in a Caption
Not everyone’s full name belongs in a public court filing. Under Federal Rule of Civil Procedure 5.2, filings that include the name of a minor may use only the minor’s initials. The same rule limits Social Security numbers to the last four digits, birth dates to just the year, and financial account numbers to the last four digits.4Cornell Law School. Federal Rules of Civil Procedure Rule 5.2 – Privacy Protection for Filings Made with the Court Criminal cases have a parallel provision under Federal Rule of Criminal Procedure 49.1.5Legal Information Institute (LII) / Cornell Law School. Federal Rules of Criminal Procedure Rule 49.1 – Privacy Protection for Filings Made with the Court
Adults can sometimes proceed under a pseudonym like “Jane Doe” or “John Doe,” but courts don’t grant this automatically. Rule 10(a) requires the complaint to name all parties, so there’s a strong presumption against anonymous litigation. A party seeking to use a pseudonym generally must show that proceeding under their real name would cause serious harm, such as threats to personal safety or disclosure of deeply sensitive information. Courts have occasionally allowed pseudonyms in cases involving sexual assault survivors, stigmatized medical conditions, and challenges to school policies, but each request is weighed on its own facts. The bar is intentionally high because public access to court proceedings is a foundational principle.
Changing a Caption After Filing
Captions aren’t fixed. Parties change, names turn out to be wrong, and new defendants get added.
Amending Party Names
If a party’s name is wrong in the original caption, Federal Rule of Civil Procedure 15 allows amendments to pleadings. A plaintiff can amend the complaint once as a matter of right within 21 days of serving it. After that window closes, amendments require either the opposing party’s written consent or the court’s permission. When an amendment corrects a party’s name, it can “relate back” to the date of the original filing, which matters when a statute of limitations is approaching. Relation back applies if the correct party received notice of the action within the time allowed for service and knew or should have known the suit was meant for them.6Cornell Law School. Federal Rules of Civil Procedure Rule 15 – Amended and Supplemental Pleadings
Substituting Parties
When a party dies, becomes incapacitated, or transfers their interest during the case, Federal Rule of Civil Procedure 25 governs how the caption gets updated. If a party dies and the legal claim survives, the court can order the deceased party’s successor or representative substituted in. If a party becomes incompetent, their legal representative can step in. When a public officer who was sued in their official capacity leaves office, their successor is automatically substituted, and courts are instructed to disregard any misnomer that doesn’t affect the parties’ substantive rights.7Cornell Law School. Federal Rules of Civil Procedure Rule 25 – Substitution of Parties
What Happens When the Caption Is Wrong
Caption errors are one of the most common reasons court clerks reject filings, particularly in electronic filing systems that check for matching case numbers and party names before accepting a document. A missing case number, an inaccurate party name, or a caption that doesn’t match the existing docket entry can all trigger a rejection.
The consequences depend on the type and severity of the mistake. A simple typo in a party’s name is usually fixable with an amended filing. Naming the wrong party entirely is more serious. Courts distinguish between a “misnomer” and a “misdescription.” A misnomer means you got the name slightly wrong but the intended party would reasonably know the filing was meant for them. A misdescription means the wrong entity altogether was named, and the intended party would have no reason to think they were the target. Misnomers are generally correctable through amendment. Misdescriptions are harder to fix, and if a statute of limitations has already expired, the mistake may be fatal to the claim.