How to File a Small Claims Case in New Mexico: Step-by-Step

Before You File: Three Things to Confirm

Before you drive to the courthouse, make sure your case actually belongs in small claims:

1. Is your claim $10,000 or less? Both Magistrate Courts and Bernalillo County Metropolitan Court cap claims at $10,000 in principal damages. Interest and court costs are excluded from the cap.

2. Are you within the statute of limitations? Written contracts get 6 years, oral contracts and property damage get 4 years, and personal injury claims get 3 years from the date of breach or injury.

3. Can you identify the defendant correctly? For individuals, you need their legal name. For businesses, search the New Mexico Secretary of State's Business Search portal to find the exact registered entity name and registered agent. Getting the name wrong can make your judgment unenforceable.

Step 1: Send a Demand Letter

A demand letter isn't legally required for most claims, but it accomplishes two things: it sometimes resolves the dispute without court, and it shows the judge you tried to settle first.

Your demand letter should state the facts (what happened, when, what's owed), include an itemized breakdown of damages, set a clear response deadline (10–14 days), and be sent by certified mail with return receipt requested. Keep the tone professional and factual — no threats.

For security deposit disputes, the $250 civil penalty under the Uniform Owner-Resident Relations Act requires bad-faith retention; a late accounting alone does not automatically establish that.

Step 2: Choose Your Court

Geography determines your court:

• Bernalillo County (Albuquerque) → Bernalillo County Metropolitan Court, using Form 4-202
• All other 32 counties → the local Magistrate Court in a county where the defendant resides, where the claim arose, or where the property involved is located, using Form 4-201

If the defendant lives in a different county from where the breach occurred, you can file in either location. File where service will be easiest — typically the defendant's county of residence.

Step 3: Complete the Complaint Form

The easiest way to generate your forms is through the free Guide & File portal on nmcourts.gov. The system asks you questions and fills in the correct form (4-201 or 4-202) with your answers. You then print the completed forms.

On the complaint, you'll provide:

• Your name, address, and phone number
• The defendant's full legal name and address
• A brief statement of facts — what happened, not legal arguments
• The exact dollar amount you're claiming
• Attached exhibits (contracts, invoices, photos, texts)

Before filing, redact any Social Security numbers, financial account numbers, and driver's license numbers from your documents.

Step 4: File and Pay the Fee

Bring your completed complaint to the court clerk's office. The filing fee is $72–$87, depending on the court. Ask the clerk which payment methods it accepts; card payments incur a 2.25% surcharge.

If you can't afford the fee, submit an Application for Free Process with your complaint. The court will review your income and assets and decide whether to waive the filing and service costs.

The clerk assigns a case number and issues a signed Civil Summons (Form 4-204). This is the document you'll serve on the defendant.

Step 5: Serve the Defendant

You cannot deliver the papers yourself. New Mexico law requires service through one of three methods:

• County sheriff: Deliver the summons packet to the sheriff's civil process division in the defendant's county. Fees run $25–$50.
• Private process server: Any disinterested adult over 18 who isn't a party to the case. Typical cost: $50–$100.
• Certified mail: Send the summons and complaint via certified mail with return receipt requested. This is the cheapest option (~$10), but it only works if the defendant personally signs the green return receipt card. Refused or unclaimed mail does not count as valid service.

Whoever serves the papers must complete the Return of Service on the back of Form 4-204 and file it with the court clerk.

Step 6: Wait for the Response

The defendant has 20 calendar days after service, excluding the day of service, to file a written Answer (Form 4-206). If they don't respond within that window, you can file a Motion for Default Judgment — which requires your Return of Service, a non-military affidavit (SCRA compliance), and proof of your damages.

If the defendant does answer, the court will schedule a hearing. Prepare your evidence: original documents plus three copies, any witnesses, and a clear, organized presentation of your timeline and damages.

The New Mexico Small Claims Filing Guide covers every step from demand letter through hearing day with checklists, form-completion examples, and a deadline tracker so nothing slips through the cracks.

See more New Mexico guides →