Is there a website where can landlords can post reviews of their tenants?

My son recently got a denial letter on an apartment he looked at a month ago. The letter came from The Landlord Connection. I don't know if this is only in NH but google it. They may be able to help you. It seems to be a place for landlords to list bad tenants. My son's denial was for "lack of credit history" so maybe they just do the credit checks for landlords.