System Settings Change the AES Encryption Key Describes how to change the encryption key used to encrypt credit card and electronic check bank account information stored in BillMax. Setup USPS Address Verification Describes the steps necessary to activate USPS Address Verification for accurate and complete addresses. Install the BillMax License Using the Staff Portal Modify the Customer Portal Application Login Credentials Modify the Staff Portal Timeout This describes how to modify the Staff Portal Timeout. This is not recommended if PCI compliance is a concern.