What Is a Uniform Summons and Complaint in Colorado?

A summons and complaint in Colorado is the pair of documents that opens a case against you: the complaint states what you’re accused of or what the other side is claiming, and the summons tells you which court to appear in and how long you have to respond. In a civil lawsuit, that response window is 21 days from the date you were served.1Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 12 Defenses and Objections Miss it, and the court can rule against you without hearing your side.

What the Documents Say

In a civil case, the complaint lays out the plaintiff’s version of the facts, the legal basis for their claims, and what they want: money damages, an injunction, or some other relief. The paragraphs are numbered. The summons, prepared by the plaintiff’s attorney and stamped by the clerk’s office, identifies the court and tells you your deadline to respond.

In a criminal case, a peace officer can issue a summons and complaint for misdemeanors and petty offenses. The document must list your name, the specific offense with a citation to the statute allegedly violated, a brief description of the conduct including date and approximate location, and the county court, date, and time where you’re required to appear.2Justia Law. Colorado Code 16-2-106 – Content of Summons and Complaint One copy is filed with the court and another goes to the district attorney.3Justia Law. Colorado Code 16-2-104 – Issuance of Summons and Complaint For most felonies, a court can also issue a summons in lieu of an arrest warrant, though not for class 1, 2, or 3 felonies, level 1 or 2 drug felonies, or unclassified felonies carrying more than ten years.4Justia Law. Colorado Code 16-5-206 – Summons in Lieu of Warrant

Was Service Valid?

A summons doesn’t legally bind you until it has been delivered correctly. The rules matter because improper service is one of your defenses.

Anyone 18 or older who is not a party to the lawsuit can serve process in Colorado. That includes county sheriffs, private process servers, and even a friend of the plaintiff who has no stake in the case.5Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 4 Process

Personal service is the standard method. The server hands the documents to you directly, leaves them at your home with a family member who is at least 18, or delivers them at your workplace to a supervisor, administrative assistant, or managing agent. If the plaintiff tried personal service and failed, they can ask the court for substituted service by filing a motion with an affidavit describing their attempts, your last known addresses, and who they want to deliver the documents to instead. The court grants the request only if the plaintiff used due diligence and the proposed method is reasonably likely to reach you.5Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 4 Process

Service by publication is limited to specific case types, mainly those involving property. When the court allows it, the notice runs once per week for five consecutive weeks in a newspaper in the county where the case is pending, and service is complete on the date of the last publication.5Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 4 Process For a criminal summons issued in lieu of a warrant, service can also be made by certified mail sent at least 14 days before the required appearance date, and it is complete when the signed return receipt comes back.4Justia Law. Colorado Code 16-5-206 – Summons in Lieu of Warrant

How Long You Have to Respond

In a civil case, your written response is due within 21 days of the date you were served.1Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 12 Defenses and Objections The clock starts the day after service and runs through weekends and holidays, except that if the last day falls on a weekend or court holiday, you have until the next business day.

Two situations stretch the deadline to 35 days: service outside Colorado, and service by publication.1Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 12 Defenses and Objections Filing a pre-answer motion, such as a motion to dismiss, pauses the clock; if the court denies the motion, you then have 14 days to file your answer.

For a criminal summons, your deadline is the court appearance date printed on the document itself. Showing up is the response.

Writing the Answer

Your answer walks through the plaintiff’s numbered paragraphs one by one, saying whether you admit the allegation, deny it, or lack enough information to respond. Anything you don’t specifically deny is treated as admitted, so vagueness works against you.

The answer is also where you plead affirmative defenses. These are reasons the plaintiff should lose or recover less even if their facts are entirely true. Common ones in Colorado include:

  • Statute of limitations: the plaintiff waited too long to sue.
  • Laches: in equity cases, the plaintiff’s delay caused you real harm, like lost evidence or inflated damages.
  • Failure to mitigate damages: the plaintiff could have taken reasonable steps to reduce their losses.
  • Res judicata: a court already decided this same dispute.
  • Offset: the plaintiff owes you money or didn’t credit a payment you already made.

If you have claims against the plaintiff that arise from the same facts, you generally have to raise them as counterclaims in your answer. Leaving out a counterclaim that comes from the same transaction can bar you from bringing it later as a separate suit. Counterclaims unrelated to the plaintiff’s facts can also go in, but aren’t required.

Pushing Back Before You Answer

You don’t have to accept the complaint as filed. Rule 12(b) lets you move to dismiss on any of six grounds instead of (or before) filing an answer:1Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 12 Defenses and Objections

  • Lack of subject matter jurisdiction: the court can’t hear this type of case.
  • Lack of personal jurisdiction: the court lacks authority over you, often because you have no meaningful tie to Colorado.
  • Insufficiency of process: the summons or complaint is defective on its face.
  • Insufficiency of service of process: the documents weren’t delivered under the rules.
  • Failure to state a claim: even taking the complaint as true, it doesn’t describe something the law recognizes as grounds for relief.
  • Failure to join a required party.

These motions must be filed on or before the date your answer is due.

If service itself was flawed, say the documents were left with someone who didn’t qualify, or handed over by someone under 18 or a party to the case, you can file a motion to quash service. The Colorado Judicial Branch provides a standard form.6Colorado Judicial Branch. Motion to Quash Service of Summons and Complaint A successful motion doesn’t end the case; it means the plaintiff has to serve you properly before it can move forward.

The plaintiff can also change the complaint. Under Rule 15, they can amend once without permission as long as you haven’t filed a responsive pleading yet. After that, they need your written consent or the court’s approval, which courts grant freely when fairness requires.7Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 15 Amended and Supplemental Pleadings If the complaint is amended after you’ve answered, you get either 14 days or whatever remains of your original response period, whichever is longer.

What Happens If You Ignore It

In a criminal case, failing to appear on the date set in the summons can result in a bench warrant for your arrest.8Justia Law. Colorado Code 16-2-110 – Failure to Appear It stays active until you’re picked up or turn yourself in. Many people learn about outstanding warrants at a routine traffic stop.

In a civil case, when the deadline passes without a response, the plaintiff can ask the clerk to enter a default based on an affidavit showing you never responded.9Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rule 55 Default The plaintiff then applies for a default judgment. If the amount owed needs calculating or specific facts need proof, the court may hold a hearing, but you won’t be there to dispute anything. A default judgment carries the same force as any other judgment: the plaintiff can garnish wages, place liens on property, or levy bank accounts.

A default judgment can sometimes be undone. Under Rule 60(b), the court may vacate it for reasons including:10Colorado Judicial Branch. Colorado Rules of Civil Procedure – Rules 55(c) and 60(b)

  • Mistake, inadvertence, or excusable neglect: a genuine reason you missed the deadline, not simple forgetfulness.
  • Fraud or misrepresentation by the other side.
  • Void judgment: the court lacked jurisdiction, or service was never properly completed.
  • Satisfaction or changed circumstances making the judgment inequitable to enforce going forward.

Courts look at whether your failure to respond was willful, whether vacating would unfairly harm the plaintiff, and whether you have a real defense worth hearing. The sooner you move after learning about the default, the better.

Filing Fees and Waivers

Responding to a civil lawsuit costs money. In Colorado district court, filing an answer is $222, and filing an answer with counterclaims or cross-claims is $451. In county court, the defendant’s answer fee scales with the size of the claim: $90 for claims under $1,000, $110 for claims from $1,000 to $14,999, and $140 for claims from $15,000 to $25,000. A defendant filing a counterclaim in county court pays the plaintiff’s rate for that tier.11Colorado Judicial Branch. List of Fees

If you can’t afford the fees, you can request a waiver using form JDF 205. You qualify if your household income is below 125% of the federal poverty guidelines. For 2026, that’s $24,938 per year for a single person, $33,813 for a family of two, $42,688 for a family of three, and $51,563 for a family of four. You also qualify automatically if you receive SSI, TANF, SNAP, Aid to the Needy and Disabled, Old Age Pension, or Aid to the Blind.12Colorado Judicial Branch. Fee Waivers Incarcerated individuals can’t get fees waived, though a percentage of the inmate account may be withdrawn monthly instead.

Where to Focus First

Read the complaint closely and note which allegations you actually dispute and which you can’t honestly deny. Check how you were served against the rules above, because a defective service gives you a motion that can reset the clock. Mark your 21-day deadline on a calendar the day you’re served, and work backward from it. If the claim is substantial or the facts are complicated, get a lawyer involved early; the window to answer closes fast, and defending against a default is harder than filing an answer on time.