Massachusetts’ residential security deposit law contains strict requirements for landlords, including returning a tenant’s security deposit within 30 days of lease termination.  As a landlord or tenant you should know your rights and options when dealing with General Laws: CHAPTER 186, Section 15B, the Massachusetts Security Deposit law.  Remedies include double or treble damages, all costs, and payment of attorney fees should a tenant prevail.  Attorney Murphy provides pro bono legal services to recover security deposits.