With the EY BKK Service APP you can communicate with your BKK even more easily: Send your AU certificate conveniently. Upload your photo for the health card or order a new card. Invoices can be uploaded. Change of your personal data (address, bank details). Download membership certificate with just a few clicks. Simply enter information about free family insurance. Personal mailbox, fast processing - uncomplicated in this secure APP - at any time and around the clock. ATTENTION: This APP contains your social data. The requirement for an authentication for the transmission of individual information (personal data) is two-factor authentication. When you log in, you receive an smsTAN via the GSM network.