Idaho ยท Unpaid invoice

Unpaid invoice in Idaho small claims

Client won't pay your invoice? Collect it in small claims.

If a client or customer has not paid an invoice for work you delivered or goods you sold, small claims court is a low-cost way to collect. You do not need a lawyer. The strength of your case usually comes down to clear proof: the agreement or terms, the invoice, evidence the work or goods were delivered, and a record of your attempts to collect.

In Idaho, small-claims cases are heard in the Small Claims Department of the Magistrate Division of the District Court and you can sue for up to $5,000.

Unpaid invoice: steps that matter

  1. Send a final written demand (a clear statement of what is owed and a payment deadline) and keep proof you sent it.
  2. Gather your contract or written terms, the invoice, delivery/completion proof, and any messages showing the other side accepted the work.
  3. Confirm you are within the statute of limitations below before you file.
  4. File in the correct court for where the defendant is or where the work happened, and keep every date and document together.

Filing your Claim (CAO SC 1-2) in Idaho

  1. Fill out the court forms. Complete the Claim form and Summons (free from the clerk or courtselfhelp.idaho.gov), sign and date them, and make a copy for yourself and each defendant. You can also file online at guideandfile.idaho.gov.
  2. File at the correct court and pay the fee. File in the county where the defendant lives or the problem happened and pay the $69 filing fee. Businesses must e-file where e-filing is available.
  3. Serve the defendant. Someone 18 or older (not you) must serve each defendant with the Summons, Claim, blank Answer, and defendant instructions, by certified mail or personal service. Incorrect service will close your case.
  4. File the Affidavit of Service. After service, the server completes the Affidavit of Service and you file it with the clerk. The deadline is usually 30 days (some courts allow up to 90); ask the clerk.
  5. Wait for the answer, then attend trial. The defendant has 21 days to answer. If they answer, the clerk mails you the trial date; if they do not, you can request a default.

Filing fees: The official self-help instructions list a $69 filing fee for small claims ($81 for a small claims appeal). Service fees (sheriff, certified mail, or process server) are additional and vary by method and county.

Deadline that applies to your unpaid invoice

An unpaid invoice is usually a contract or account claim. If you had a signed agreement or written terms, the written-contract statute of limitations below typically applies; a purely verbal deal usually falls under the oral-contract period. That statute is the deadline to file, so do not wait too long.

Written contract: 5 years (Idaho Code 5-216)

Answering a lawsuit: 21 days from service.

Serving the defendant: Each defendant must be served by someone 18 or older who is not the plaintiff, by certified mail (return receipt) or personal service via the sheriff, a process server, or another uninvolved adult. File the Affidavit of Service afterward, usually within 30 days (some courts allow up to 90).

Appeals: File a notice of appeal in the court that heard the case within 30 days of judgment; the appeal is a trial de novo.

This page is general information, not legal advice, and CaseBySelf is not a law firm. Rules, fees, and deadlines change and vary by court: verify with the specific court where you file. Source: Idaho Courts Self-Help: Small Claims. Last reviewed 2026-06-24.