Systems and methods maintain a database of recipient names and addresses where the delivery point addresses contain secondary address. Data that is stored in the database may be arrayed in secure data tables. The structure of the secure data tables ensures that the data is secure and prevents an unauthorized user from learning address information improperly. A delivery service provider may create secure data tables using 20-byte Secure Hash Algorithm. A software searches secure data tables for the matching recipient name and address. If the match is found, a business sender may receive valid secondary address information for that recipient. If, however, a database does not contain a matching recipient name and address, a business sender may not receive any further information about that recipient's address.