This form is used to make a written offer to purchase real estate. There are two main offer forms used in Massachusetts.We'll explain exactly what you should include in your offer letter. By the time you're done reading, you'll know how to write a winning real estate contract. The following new and updated forms have been sent to the forms providers. Please note it could take several days for the new forms to populate. To start, you'll need to put your intent in writing, in the form of a home offer letter. In Massachusetts, an offer letter is a legally binding document that communicates your intent to purchase a property from the seller. Q: What is the Massachusetts Mandatory Real Estate Licensee Consumer Relationship Disclosure Form? Send ma offer to purchase form via email, link, or fax.