Agreement must be paid on the _____ day of every ☐ Week ☐ Month (check one). A Massachusetts sublease agreement is a document outlining the terms of sharing a rental property with new renters under the parameters of an existing lease.Create your Massachusetts sublease agreement to rent your unit. Use our free template to sublet to a new tenant. The Massachusetts sublease agreement allows for a tenant (the "sublessor") to rent out space that they currently have under lease to another individual. A Massachusetts sublease agreement allows a tenant with an active lease to rent out their residence to a subtenant. A valid Massachusetts sublease agreement must describe the property in great detail. This includes the address, size, and purpose. A sublet template confirms that the landlord has performed the standard background checks on the new tenant. Massachusetts Sublease Agreement is a document between a tenant and a subtenant whom agrees to rent the same property.