Filing a Lawsuit

The short version

Filing a lawsuit is how you officially start a civil court case. It involves preparing and submitting specific legal documents to the court, outlining your claims and what you want the court to do. This process sets the foundation for your entire case and must follow strict rules to be valid.

The law this is built on

Every point below comes from the authority named next to it. Verify the current text before relying on it.

Fed. R. Civ. P. 3
A civil action is started by filing a complaint with the court.
Why it matters: This rule tells you the very first step to take: create and submit a document called a 'complaint' to the court.
Fed. R. Civ. P. 4(a)-(c)
Once you file the complaint, the court clerk issues a 'summons.' Then, you, the plaintiff, are responsible for properly 'serving' both the summons and the complaint on the defendant.
Why it matters: It's not enough just to file; you must formally notify the other party (the defendant) that they are being sued, and this rule explains how to do that correctly.
Fed. R. Civ. P. 7(a)
This rule lists the allowed types of pleadings, which are formal documents submitted to the court. The main ones are a complaint (filed by the plaintiff) and an answer (filed by the defendant).
Why it matters: This rule defines what legal documents you can file to make your case, starting with the complaint.
Fed. R. Civ. P. 8(a)
A complaint must contain: (1) a short and plain statement of the court's jurisdiction; (2) a short and plain statement showing you are entitled to relief; and (3) a demand for the relief you seek.
Why it matters: This rule tells you exactly what information your complaint must include so the court understands your case and what you want.
Fed. R. Civ. P. 11(b)
When you present a document to the court, you are certifying that, to the best of your knowledge and belief after reasonable inquiry, it is not being used for improper purposes, the legal claims are warranted by existing law, and the facts have evidentiary support.
Why it matters: This rule means you can't just make things up. You have a legal duty to make sure your lawsuit has a good faith basis in facts and law, or you could face penalties.

Words you need to know

Plaintiff: The person or entity who starts a lawsuit by filing a complaint with the court.
Defendant: The person or entity being sued by the plaintiff in a lawsuit.
Complaint: The main legal document filed by the plaintiff that begins a civil lawsuit. It states the legal claims and what the plaintiff wants from the court.
Summons: An official court document that notifies the defendant that a lawsuit has been filed against them and that they must respond within a certain time.
Service of Process: The formal procedure of delivering the summons and complaint to the defendant. It must be done correctly to ensure the defendant is properly notified.
Jurisdiction: A court's legal authority to hear and decide a case. Your complaint must show that the court you chose has jurisdiction over your case.
Pleading: A formal written statement filed with the court, such as a complaint or an answer, that sets out a party's claims or defenses.

Your rights

✓You have the right to initiate a civil lawsuit if you believe another party has harmed you and you have a valid legal claim.
✓You have the right to clearly state your claims and what you are seeking in your complaint (Fed. R. Civ. P. 8(a)).
✓You have the right to have your complaint filed and a summons issued by the court clerk (Fed. R. Civ. P. 3 and 4(b)).
✓You have the right to amend (change) your complaint under certain circumstances, usually early in the case or with court permission (Fed. R. Civ. P. 15).
✓You have the right to represent yourself in court, though it is often complex.

How the process actually works

1
Draft the Complaint
Before you can start your case.
You (or your attorney) write a formal document called a complaint. This document must explain why the court has authority over the case (jurisdiction), state the facts of what happened, list your legal claims, and tell the court what you want (e.g., money, an order for someone to do something). This must meet the requirements of Fed. R. Civ. P. 8(a).
2
Sign and Certify the Complaint
Before filing.
You (or your attorney) must sign the complaint. By signing, you are telling the court that you've done your homework, believe the facts are true, and the legal claims are valid based on existing law or a good argument for new law (Fed. R. Civ. P. 11(b)).
3
File the Complaint
To officially begin the lawsuit.
You submit the original complaint and any required copies to the clerk of the proper court. There is usually a filing fee. This action officially starts the civil case (Fed. R. Civ. P. 3).
4
Obtain a Summons
Immediately after filing the complaint.
After you file the complaint, the court clerk will issue a summons. This is an official notice to the defendant that they are being sued (Fed. R. Civ. P. 4(b)).
5
Serve the Defendant
Within a specified number of days after filing the complaint (Fed. R. Civ. P. 4(m)).
You are responsible for making sure the summons and a copy of the complaint are formally delivered to the defendant. This is called 'service of process' and must follow specific rules to be valid (Fed. R. Civ. P. 4(c)-(e)).
6
Proof of Service
Promptly after service.
After the defendant is served, the person who delivered the documents must file a 'proof of service' with the court, showing that the defendant was properly notified (Fed. R. Civ. P. 4(l)).

Deadlines that can end your case

Statute of Limitations
Varies by state and type of claim
This is the most critical deadline. If you miss it, you generally lose your right to sue forever, regardless of how strong your case is.
Serving the Defendant
90 days from filing the complaint (in federal court, Fed. R. Civ. P. 4(m))
If you don't serve the defendant within this time, the court may dismiss your case without prejudice (meaning you might be able to refile it, but could face new deadlines or issues).
Defendant's Response to Complaint
21 days after being served with the summons and complaint (in federal court, Fed. R. Civ. P. 12(a)(1)(A))
While this is the defendant's deadline, it's crucial for you to know. If the defendant doesn't respond, you might be able to ask the court for a 'default judgment'.

Costly mistakes

✕Filing in the wrong court (e.g., a court without jurisdiction over the case or the parties).
✕Missing the statute of limitations deadline, which permanently bars your claim.
✕Failing to properly serve the defendant with the summons and complaint, leading to dismissal of your case.
✕Drafting a complaint that doesn't meet the legal requirements, such as not stating a clear legal claim or lacking sufficient facts.
✕Filing a lawsuit without a reasonable basis in fact or law, which can lead to sanctions under Fed. R. Civ. P. 11.
✕Not understanding or paying the correct court filing fees.

Your checklist

Determine the proper court (state or federal, and specific location) where your lawsuit should be filed.
Identify all necessary parties: who is the plaintiff and who are the defendants?
Gather all relevant facts and documents to support your claims.
Draft a complaint that clearly states your claims, why the court has jurisdiction, and what relief you are seeking, following Fed. R. Civ. P. 8.
Sign the complaint, ensuring you've made a reasonable inquiry into the facts and law (Fed. R. Civ. P. 11).
File the complaint with the court clerk and pay the required filing fee.
Obtain the summons from the court clerk.
Arrange for proper service of the summons and complaint on each defendant, following Fed. R. Civ. P. 4.

Common questions

What does it mean to 'file' a lawsuit?

To 'file' a lawsuit means to formally submit the initial legal document, called a complaint, to the court clerk. This action officially starts your civil court case (Fed. R. Civ. P. 3).

Do I have to pay to file a lawsuit?

Yes, usually there is a filing fee that you must pay when you submit your complaint to the court. If you cannot afford the fee, you may be able to ask the court to waive it by filing a 'motion to proceed in forma pauperis'.

What happens if I don't serve the defendant correctly?

If you don't properly serve the defendant with the summons and complaint, the court cannot hear your case against that defendant. Your case could be dismissed without prejudice (meaning you might be able to try again) if you fail to serve within 90 days (Fed. R. Civ. P. 4(m)).

Can I sue for anything I want?

No. When you sign and file a complaint, you are certifying to the court that your claims have a good-faith basis in existing law or a non-frivolous argument for new law, and that your factual claims have or will have evidence to support them (Fed. R. Civ. P. 11(b)). You cannot sue for frivolous reasons or without factual support.

What is the difference between a complaint and an answer?

A complaint is the document filed by the plaintiff to start the lawsuit, stating their claims and what they want. An answer is the document filed by the defendant in response to the complaint, admitting or denying the plaintiff's claims and sometimes stating their own defenses or counterclaims (Fed. R. Civ. P. 7(a)).

How this changes by state

While the Federal Rules of Civil Procedure (like Fed. R. Civ. P. 3-11) govern lawsuits in federal courts, each state has its own set of rules for filing lawsuits in state courts. These state rules often follow similar principles but can have important differences, such as specific requirements for the complaint, how service of process must be performed, and the exact deadlines. To find your state's rules, you should look for the 'Rules of Civil Procedure' for your specific state's court system (e.g., 'California Rules of Civil Procedure' or 'Texas Rules of Civil Procedure').

When you need a lawyer

You should consider hiring a lawyer when your legal issue is complex, involves significant money or rights, or if you are unfamiliar with court procedures. Lawyers understand the specific requirements for drafting complaints, ensuring proper service, and navigating deadlines. Mistakes made at the outset of a lawsuit can be difficult or impossible to fix later, potentially costing you your case.

Do this today

→Identify the specific harm you believe you've suffered and who caused it.
→Research the statute of limitations for your type of claim in your state to ensure you haven't missed your deadline.
→Consult with an attorney to discuss the merits of your potential lawsuit and understand the legal process.

This lesson is legal information for educational purposes only, based on Fed. R. Civ. P. 3–11. It is not legal advice and does not create an attorney-client relationship.