Washington ยท Unpaid invoice

Unpaid invoice in Washington 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 Washington, small-claims cases are heard in the District Court (Small Claims Department) and you can sue for up to $10,000 (for an individual; $5,000 for businesses and other entities).

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 Notice of Small Claim in Washington

  1. Prepare the Notice of Small Claim. Complete the Notice of Small Claim form provided by the district court clerk. It must include the plaintiff's name and address; a sworn statement briefly describing the claim, the amount, and when it occurred; a statement requiring the defendant to appear in person; and notice that failure to appear may result in a judgment for the amount requested.
  2. File with the district court clerk and sign before the clerk. File in the district court of the county where the defendant resides (see RCW 3.66.040 for exceptions). The plaintiff must sign the Notice in the presence of the clerk unless the court instructs otherwise. The clerk enters a hearing/trial/response date on the form.
  3. Pay the filing fee. Pay the clerk a filing fee at the time of filing: $35 or $50 depending on whether the county supports a dispute resolution center. Service/mailing costs are additional and may be recoverable if you win.
  4. Serve the defendant. After filing, have the Notice served on the defendant by someone who is not the plaintiff, either by personal service (by a non-party over 18 competent to be a witness, or the sheriff/deputy) or by registered/certified mail with a signed return receipt filed with the court. The defendant must be served at least ten calendar days before the scheduled hearing.
  5. Prepare for and attend the hearing. Gather all documents, photos, receipts, estimates, and records, and appear at the assigned courtroom on the hearing date. Some courts require mediation first. The judge hears both sides informally and normally announces the decision and enters judgment at the hearing.

Filing fees: Filing and service fees are set locally and vary; confirm the current amount with the court. A fee waiver is available if you cannot afford the costs.

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: 6 years (RCW 4.16.040(1))

Answering a lawsuit: Washington small claims has no traditional written-answer deadline. Instead of filing an answer, the defendant must appear in person at the hearing set by the court, and must be served the Notice of Small Claim at least ten calendar days before the scheduled hearing. A defendant who wishes to file a counterclaim does so by paying a fee, filing it with the court, and serving the plaintiff.

Serving the defendant: After filing, the Notice of Small Claim must be served on the defendant by someone who is not the plaintiff, either by personal service or by mail. Personal service may be made only by (1) a non-party over age 18 competent to be a witness, or (2) the sheriff or a deputy of the county where the court is located, using the methods in RCW 4.28.080. Alternatively it may be sent by registered or certified mail, with a signed return receipt filed with the court. Service must occur at least ten calendar days before the scheduled hearing.

Appeals: Either party may appeal an adverse judgment to the Superior Court, following chapter 12.36 RCW, by taking the required steps within 30 days of entry of judgment (file a written Notice of Appeal with the district court, serve the other parties, pay a $20 transcript fee, deposit the $280 superior court filing fee plus a $40 appeal preparation processing fee, and post a bond equal to twice the judgment/amount in controversy). No appeal is allowed if the original amount sued for was less than $250; a party who brought a claim or counterclaim may appeal only if the amount originally sued for exceeded $1,000.

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: Washington Courts - Small Claims Court resources page. Last reviewed 2026-06-23.