Here are house offer letter samples to win a bidding war. 3 examples to use as a reference point.We've put together a few tips on how to write a letter to new home buyers as a seller so the house that was yours can welcome them right. 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. When we sold our home we had multiple offers, and some included letters. A little tutorial on how to put an offer. A proof of funds letter is upfront proof that you are financially able to purchase the home. Here's what one looks like and how to get it. Learn how to write a house offer letter that will be sure to make you stand out from the competition. For example, you may need a death certificate to claim a benefit.