I want to write a letter that is compelling. My realtor says he's not allowed to attach letters to offers because he can lose his license.These forms will be useful when filing required documents related to estates of deceased or incapacitated persons. After being approved to purchase, a proposal to buy the property must be signed. Learn how to write a house offer letter that will be sure to make you stand out from the competition. Consider the pros and cons of writing a house offer letter in real estate transactions. Learn when to write a letter and when to avoid one. Your letter should explain why you're interested in buying the house and include details regarding your mortgage financing and expected closing date. There is no charge for search and images for these offices. Real Estate eBill Privacy Policy.