Abstract: A method for securely adding financial accounts maintained by an issuer without an issuer-specific TSM to a secure element using a service system that creates a secure TSM add-on module for the issuer within the service system TSM, and a sub-domain that is specific to the issuer within the secure element. The issuer designates instructions and commands as insecure information and sensitive financial information as secure information, and communicates each type of information via a designated interface that is designed to correspond to the required security of the type of information. The issuer transmits insecure instructions to the service system and in turn a digital wallet application to create a new account record in the application. The issuer encrypts the secure financial information and transmits it to the issuer domain of the secure element through the account services system TSM over a dedicated interface.