Suing for an Unpaid Invoice in Massachusetts Small Claims Court

When an Invoice Goes Unpaid

You completed the work, sent the invoice, followed up, and heard nothing. Or worse—the client acknowledged the debt and still did not pay. At some point, follow-up emails stop working and you need a legal mechanism to recover what you are owed.

Massachusetts small claims court handles this type of money dispute. If the unpaid amount is $7,000 or less, you can file a claim without hiring a lawyer. The clerk schedules a hearing after accepting the filing.

Before You File: The Demand Letter

Send a written demand letter before filing. Massachusetts does not require a formal demand for a standard contract claim, but a demand letter establishes that you made a reasonable effort to resolve the dispute. It also creates a document trail that strengthens your case at the hearing.

Your demand letter should state:

• The specific work you performed or goods you delivered
• The invoice number, date, and amount
• The date payment was due
• That you expect payment within a specified period (14 or 30 days is typical)
• That you intend to file a small claims action if payment is not received

Send it by certified mail so you have proof it was delivered. Keep a copy for your evidence file.

If you are an individual consumer bringing a claim for unfair or deceptive business practices, Chapter 93A, § 9 may apply. It requires a separate demand letter served at least 30 days before filing and may allow double or triple damages. A business invoice claim based only on non-payment is a contract claim; do not assume § 9 applies.

Getting the Defendant's Legal Name Right

This is where many invoice collection cases go wrong. You need to sue the correct legal entity, and the name on the invoice may not be it.

If the client is an individual, sue them under their legal first and last name at their residential address.

If the client is a sole proprietorship (DBA), name the individual owner personally, followed by the trade name: "John Doe d/b/a Doe's Design." Verify the DBA registration through the municipal clerk's Business Certificate filings in the city or town where the business operates.

If the client is a corporation or LLC, sue the exact entity name registered with the Secretary of the Commonwealth Corporations Division. Search their online database to get the precise corporate name and the registered agent's address for service.

Filing against the wrong name can result in an unenforceable judgment—you win on paper but cannot collect because the judgment names an entity that does not legally exist.

Filing as a Business Plaintiff

If you are filing the claim in the course of your trade or commerce—as in a typical business invoice claim—Uniform Small Claims Rule 2(b) requires you to submit a Verification of Defendant's Address form (MA-DC-SC-7) along with your Statement of Small Claim.

This form certifies the methods you used to verify the defendant's mailing address. If you skip it and the defendant does not show up, the court cannot enter a default judgment. Your case stalls.

What to Bring to the Hearing

For an unpaid invoice case, the Clerk-Magistrate will want to see a clear chain from agreement to non-payment:

1. The contract or agreement. Written contracts are strongest. Email confirmations, text messages agreeing to the work and price, or even a detailed proposal the client accepted all work.
2. The invoice(s). Showing the amount, date, and payment terms.
3. Proof of delivery or completion. Emails confirming the work was done, delivery receipts, project files, or sign-off documents.
4. Your demand letter and proof of mailing. The certified mail receipt and any response (or non-response).
5. Payment history. If the client made partial payments, bring bank statements showing what was received and what remains outstanding.

Prepare three copies of everything—one for the magistrate, one for the defendant, one for you.

The Statute of Limitations

Contract claims in Massachusetts carry a six-year statute of limitations under G.L. c. 260, § 2. The clock starts on the date payment was due, not the date you realized you would not be paid. If the invoice is more than six years old, the defendant has an absolute defense.

After the Judgment

Winning a judgment does not mean the money appears. The court does not collect on your behalf. If the defendant does not pay voluntarily, you can request a payment hearing where the court examines the debtor's income and assets, or pursue supplementary process under G.L. c. 224 for installment payments or asset surrender.

The judgment accrues post-judgment interest at 12% per year until paid, which provides the debtor some incentive to settle.

Getting the Complete Process

An unpaid invoice claim is procedurally straightforward, but the details—correct party naming, the business-plaintiff verification form, evidence organization—determine whether you get a judgment you can actually enforce. The Massachusetts Small Claims Filing Guide covers the entire sequence from demand letter through post-judgment collection, with specific sections on commercial plaintiff requirements.

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