A home purchase offer chase in Montgomery County is oftern over 50 pages. Learn about the seven to ten basic business terms in every offer.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. Do you know how to write an offer letter for a house? We're here to teach you the ins and outs to improve your chance of closing a deal. Focus on three things: State your intentions, show that you have the financial means to make the purchase and make a personal appeal to the seller. Dear Monty: We have a showing scheduled next week for a home. The seller's agent is asking for a copy of our preapproval letter. Address the Seller and Introduce Yourself.