Guide
How to Write a Security Deposit Demand Letter in Massachusetts
If your landlord hasn't returned your security deposit, or kept part of it without following the rules in M.G.L. c. 186, §15B, a written demand letter is usually the right first step before small claims court. Here's how to write one.
When should you send a demand letter?
Common triggers include: it's been more than 30 days since you moved out and you haven't gotten your deposit back, your landlord never sent a bank receipt for the escrowed deposit, or you received an itemized list of deductions that was late, unsworn, or full of ordinary wear-and-tear charges. For a full rundown of the underlying rules, see our guide to Massachusetts security deposit law.
What to include in the letter
A solid demand letter is factual and specific. At a minimum, it should include:
- Your name and address, your landlord's name and address, and the rental property address
- The dates of your tenancy and the amount of your deposit
- The specific requirement(s) of §15B your landlord didn't meet, with citations
- The exact dollar amount you're demanding
- A clear deadline to respond (10 business days is a common, reasonable window)
- A statement that you're prepared to pursue small claims court remedies, which can include treble damages, interest, court costs, and attorney's fees under §15B(7), if the deadline passes without payment
Keep the tone firm, not threatening
State the facts and the law plainly. Avoid guarantees about how a court will rule. Say what the law allows ('may be entitled to,' 'can expose the landlord to'), not what's certain to happen.
How to send it
Send your letter by certified mail with return receipt requested. This gives you a dated record that your landlord actually received it, which matters if you end up in court. Keep a copy of exactly what you sent, along with your mailing receipt and tracking number.
What happens after you send it
Your landlord has until the deadline you set to respond or pay. If they don't, small claims court is designed for cases like this and doesn't require a lawyer. In Massachusetts, small claims generally covers claims of $7,000 or less, with tiered filing fees (roughly $40 to $150 depending on the amount, though you should confirm the current fee with the court). You file a "Statement of Small Claim and Notice" in the District Court, Boston Municipal Court, or Housing Court location tied to where you live, where your landlord does business, or where the rental property is located.
Frequently asked questions
Do I need a lawyer to write a security deposit demand letter?
No. A demand letter just needs to state the facts, cite the specific §15B requirements that weren't met, name a dollar amount, and set a response deadline. Many tenants write and send one themselves.
How should I send a demand letter to my landlord?
Certified mail with return receipt requested. It creates dated proof your landlord received the letter, which matters if the dispute ends up in small claims court.
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