What Happens When Someone Files a Civil Lawsuit?

Last Updated: June 7, 2026

Short Answer

When someone files a civil lawsuit, they are asking a court to resolve a legal dispute. The person who files the lawsuit is usually called the plaintiff. The person or business being sued is usually called the defendant.

A civil lawsuit often begins with a document called a complaint. The complaint explains what happened, why the plaintiff believes the defendant is legally responsible, and what the plaintiff wants from the court.

After the lawsuit is filed, the defendant must usually be notified. Then the defendant may respond, the parties may exchange information, and the case may settle, be dismissed, or go to trial.

Civil lawsuits can be simple or very complex depending on the facts, the court, the parties, and the type of claim.

What Is a Civil Lawsuit?

A civil lawsuit is a legal case between two or more parties. It is not the same as a criminal case. In a criminal case, the government prosecutes someone for allegedly violating criminal law. In a civil lawsuit, one party usually claims that another party caused harm, broke an agreement, violated a legal duty, or failed to respect a legal right.

Civil lawsuits may involve:

• Money disputes
• Contract problems
• Personal injury claims
• Property damage
• Landlord-tenant issues
• Consumer complaints
• Business disputes
• Employment-related claims
• Debt collection
• Family-related civil matters

The goal of a civil lawsuit is usually to resolve the dispute. The court may award money, issue an order, dismiss the case, or make another legal decision.

For a broader overview, see our guide on civil law vs. criminal law.

Step 1: The Plaintiff Files a Complaint

Most civil lawsuits begin when the plaintiff files a complaint with the court.

A complaint usually explains:

• Who the parties are
• What happened
• How the plaintiff was harmed
• Why the defendant may be legally responsible
• What law or legal theory may apply
• What the plaintiff is asking the court to do

The plaintiff may ask for money damages, a court order, or another type of legal relief.

For example, if a homeowner sues a contractor for unfinished work, the complaint may explain the contract, what work was promised, what went wrong, how much money was lost, and what compensation the homeowner is requesting.

The complaint is an important document because it sets the basic foundation of the lawsuit.

Step 2: The Court Opens a Case

After the complaint is filed, the court usually assigns the case a case number. This number is used to track filings, deadlines, hearings, motions, orders, and other court activity.

The court may also assign the case to a judge.

At this stage, the court is not saying that the plaintiff is right or that the defendant did anything wrong. Filing a lawsuit only begins the legal process. The claims still need to be answered, challenged, settled, proven, or decided.

Step 3: The Defendant Is Served

After the lawsuit is filed, the defendant must usually be officially notified. This process is commonly called service of process.

Service usually means the defendant receives copies of important court documents, such as:

• The complaint
• A summons
• Instructions or deadlines for responding

Service is important because a person or business should have notice that they are being sued and should have an opportunity to respond.

Rules for service can vary by court and state. In many cases, service must follow specific procedures. If service is not done correctly, it can create delays or legal issues in the case.

Step 4: The Defendant Responds

After being served, the defendant usually has a limited amount of time to respond. The exact deadline depends on the court and the type of case.

A defendant may respond in several ways.

The Defendant May File an Answer

An answer is a formal response to the complaint. In an answer, the defendant may admit, deny, or state that they do not have enough information to admit or deny the plaintiff’s claims.

The defendant may also raise defenses.

For example, the defendant may argue:

• The plaintiff’s facts are wrong
• The plaintiff waited too long to sue
• The defendant did not cause the harm
• The contract was not valid
• The court does not have authority over the case
• The plaintiff failed to state a valid legal claim

The Defendant May File a Motion to Dismiss

A motion to dismiss asks the court to end the case, or part of the case, before it moves forward.

A defendant may argue that even if the plaintiff’s statements are accepted as true, the complaint still does not support a valid legal claim.

The judge may grant the motion, deny the motion, or allow the plaintiff to correct the complaint.

The Defendant May Not Respond

If the defendant does not respond by the required deadline, the plaintiff may ask the court for a default judgment. A default judgment may allow the plaintiff to win because the defendant failed to participate.

This is why it is important not to ignore court papers.

Step 5: The Parties May Exchange Information

If the case continues, the parties may enter a stage called discovery.

Discovery is the process where each side gathers information from the other side to prepare for settlement, motions, or trial.

Discovery may include:

• Written questions
• Requests for documents
• Requests for admissions
• Depositions
• Expert reports
• Inspection of property or evidence

A deposition is an out-of-court question-and-answer session where a witness answers questions under oath. A court reporter usually records the testimony.

Discovery can be one of the longest parts of a civil lawsuit. It helps both sides understand the evidence, evaluate the strength of the case, and decide whether settlement makes sense.

Step 6: The Parties May Try to Settle

Many civil lawsuits settle before trial. A settlement means the parties agree to resolve the dispute without having the judge or jury decide the final outcome.

Settlement may happen early in the case, during discovery, shortly before trial, or even during trial.

A settlement may include:

• A payment of money
• A payment plan
• A promise to repair something
• A promise to stop certain conduct
• A confidentiality agreement
• A dismissal of the lawsuit
• No admission of fault

Settlement does not always mean one side admits wrongdoing. In many cases, parties settle because they want to avoid the cost, stress, risk, and uncertainty of continuing litigation.

Step 7: The Court May Decide Motions

Before trial, either party may ask the court to decide certain legal issues.

Common motions may include:

• Motion to dismiss
• Motion to compel discovery
• Motion for summary judgment
• Motion to exclude evidence
• Motion for sanctions

A motion for summary judgment asks the court to decide a case, or part of a case, without a trial because there is no genuine dispute about important facts and one side is entitled to judgment as a matter of law.

If the judge grants summary judgment, the case may end before trial. If the judge denies it, the case may continue.

Step 8: The Case May Go to Trial

If the case does not settle or get dismissed, it may go to trial.

At trial, each side has the opportunity to present evidence and arguments. Depending on the case, the trial may be decided by a judge or a jury.

A civil trial may include:

• Opening statements
• Witness testimony
• Documents and exhibits
• Cross-examination
• Expert testimony
• Closing arguments
• Jury instructions, if there is a jury
• A verdict or decision

In many civil cases, the plaintiff must prove the claim by a standard called preponderance of the evidence. In simple terms, this usually means the plaintiff must show that the claim is more likely true than not.

This standard is lower than the criminal law standard of beyond a reasonable doubt.

Step 9: The Court Enters a Judgment

After the court or jury reaches a decision, the court may enter a judgment.

A judgment is the court’s official decision about the case.

The judgment may say that:

• The plaintiff wins
• The defendant wins
• The plaintiff is awarded money
• One party must do something
• One party must stop doing something
• The case is dismissed

Winning a civil lawsuit does not always mean the money is collected immediately. In some cases, collecting a judgment may require additional legal steps.

Step 10: A Party May Appeal

After a final judgment, one party may have the right to appeal. An appeal asks a higher court to review legal errors that may have happened in the case.

An appeal is not usually a new trial. The appeals court generally reviews the record from the lower court.

Appeals can be complicated and deadline-sensitive.

Simple Example of a Civil Lawsuit

Imagine a small business hires a web designer to build a website for $5,000. The business pays the full amount, but the designer never finishes the work.

The business may file a civil lawsuit.

The process may look like this:

1. The business files a complaint.
2. The web designer is served.
3. The web designer files an answer.
4. Both sides exchange emails, contracts, invoices, and payment records.
5. The parties discuss settlement.
6. If they cannot settle, the case may go to trial.
7. The court decides whether the web designer owes money.

This is a simplified example. Real cases may involve more steps, deadlines, defenses, and court rules.

Common Mistakes People Make

Mistake #1: Ignoring Court Papers

Ignoring a lawsuit can lead to a default judgment. Even if you believe the lawsuit is wrong, you may still need to respond properly.

Mistake #2: Waiting Too Long

Civil lawsuits often involve strict deadlines. Waiting too long can hurt your case.

Mistake #3: Assuming the Court Will Investigate for You

In a civil lawsuit, the parties usually need to present their own evidence. The court does not automatically gather all facts for you.

Mistake #4: Thinking Every Case Goes to Trial

Many civil lawsuits end before trial through settlement, dismissal, or court rulings.

Mistake #5: Filing Without Understanding the Rules

Court rules can be technical. Filing the wrong document, missing a deadline, or suing in the wrong court can create serious problems.

When Should You Talk to a Lawyer?

You may want to speak with a licensed attorney if:

• You receive a summons or complaint
• You are thinking about filing a lawsuit
• You are facing a large money claim
• You do not understand the deadline to respond
• You need help with evidence or court rules
• The other side has a lawyer
• The case involves injury, property, business, employment, debt, or housing
• You are unsure whether settlement is a good idea

A lawyer can help explain your options, deadlines, risks, and possible next steps based on your specific situation.

Final Thoughts

A civil lawsuit is a formal legal process for resolving disputes. It usually begins with a complaint, followed by service, a response from the defendant, discovery, possible settlement, motions, trial, and judgment.

Not every case follows the exact same path. Some cases settle quickly. Some are dismissed early. Others take months or years to resolve.

The most important thing to remember is this: a civil lawsuit is serious, and deadlines matter. If you receive court papers or are considering filing a lawsuit, it may be wise to speak with a licensed attorney in your area.

Sources to Review

• U.S. Courts — Civil Cases
• U.S. Courts — Covering Civil Cases
• Cornell Legal Information Institute — Discovery
• Cornell Legal Information Institute — Pleading
• Cornell Legal Information Institute — Default Judgment