How do you write an appeal letter to housing authority to expose my land lord so i can keep my section 8?

The purpose of an appeal letter is not to get your landlord in trouble, just to keep your section 8 voucher. The purpose of an appeal letter is to focus on the reason your voucher was terminated. Your landlord may or may not have been a contributing factor towards the termination of your voucher. If he was, and you feel that he was wrong in doing so, then your appeal letter can address that issue. If you feel your landlord has done something wrong then you need to write or call the agency or entity dealing with that issue.