How to Find the Defendant's Legal Name for Small Claims in Massachusetts

Your Statement of Small Claim requires the defendant's exact legal name. Get it wrong and you risk an unenforceable judgment — a piece of paper that says "Mike's Plumbing" owes you $4,000 when the actual entity is "Michael J. Sullivan d/b/a Mike's Plumbing" or "Sullivan Plumbing Services LLC." A judgment is generally entered against the named defendant, so misidentifying the party can make it difficult to enforce.

Why the Exact Name Matters

A judgment is enforceable only against the named defendant. If you sue a trade name that is not a legal entity, collection tools like supplementary process, bank levies, and wage attachments have nothing to attach to. The same problem arises if you sue an LLC under a slightly wrong name — "Sullivan Plumbing" instead of "Sullivan Plumbing Services LLC."

Spending 15 minutes on the lookup before you file saves you from discovering the problem after you have already paid the filing fee and waited weeks for a hearing.

Looking Up Corporations and LLCs

The Secretary of the Commonwealth's Corporations Division maintains a free, searchable database of every corporation, LLC, and limited partnership registered in Massachusetts.

Go to the Corporations Division search page and search by the business name as you know it. The results will show:

• The exact registered entity name (this is what goes on your Statement of Small Claim)
• The entity type (corporation, LLC, limited partnership)
• The registered agent's name and address (this is who gets served with the court papers)
• The entity's status (active, dissolved, revoked)

If the search shows that the business is dissolved or revoked, confirm the proper defendant name and service address before filing; the listing alone does not establish how to serve the defendant.

Looking Up Sole Proprietors and DBAs

Sole proprietors and partnerships that operate under a trade name (a "doing business as" name) register a Business Certificate with the city or town clerk where they operate. These filings are public records.

Contact the clerk's office of the municipality where the business operates and ask for a copy of their Business Certificate filing. The certificate links the trade name to the individual owner's legal name and address.

When suing a sole proprietor, name both the person and the trade name on your claim: "Michael J. Sullivan d/b/a Mike's Plumbing." This ensures the judgment is enforceable against the individual.

Looking Up Individuals

If you are suing a person (not a business), you need their full legal name and current residential address. The name on a contract, a check, or an email signature is usually correct, but if you are unsure:

• Check the contract or written agreement for the full name
• The Massachusetts Registry of Motor Vehicles can verify names in vehicle-related disputes (through a records request)
• Property records through the county Registry of Deeds or the assessor's office can confirm a homeowner's legal name

When the Business Has Multiple Layers

Some businesses operate through a complex structure — a franchise location owned by an LLC that is managed by another LLC. If you contracted with a specific location, identify the entity that signed the contract or that is listed on the invoice. That is your defendant.

If you are unsure which entity is the right one, compare the contract, invoice, and corporate records to identify the entity you dealt with. Do not assume the court can sort out liability among affiliated companies; get legal guidance if you still cannot identify the defendant.

What to Do With the Information

Once you have the exact legal name and the registered agent's address (or the individual's residential address):

1. Enter the name exactly as registered on the Statement of Small Claim
2. Use the registered agent's address as the defendant's address for service
3. Keep a printout of your search results — if the defendant later claims they were improperly named, you have documentation of your due diligence

The Massachusetts small claims filing guide includes a defendant venue worksheet that walks through entity identification, address verification, and proper party naming step by step.

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