For information please contact our corporate office by phone or email. Corporate Office 36135 Schoolcraft Livonia, Michigan 48150 800.961.2909 734.591.0140 fax Email info@herndon-assoc.com If you would like to submit a request, please use the Client Login to login to the Client Portal. If you do not currently have an H&A Client login, please use the Client Login to create an account.