Method for deterministically linking mobile applications comprising: in a mobile electronic device comprising at least one computer processor; accessing, by an electronic wallet computer application, a financial institution mobile application having a plurality of provisioned accounts associated with a customer, wherein the electronic wallet computer application and the financial institution mobile application are both executed by mobile electronic device; determining, by the electronic wallet computer application and based on the access to the financial institution mobile application, that there is an account out of the plurality of provisioned accounts that is eligible for provisioning to the electroni wallet computer application; displaying, by the electronic wallet computer application, a provisioning icon on a display of the mobile electronic device; receiving, by the electronic wallet computer application, a selection of the provisioning icon; receiving, by the electronic wallet computer application, login credentials for the customer; authenticating, by the electronic wallet computer application and using the login credentials, the customer with a financial institution backend associated with the financial institution mobile application; initiating, by the electronic wallet computer application, a secure session with the financial institution backend; requesting, by the electronic wallet computer application, an identification of an account that is eligible for provisioning to the electronic wallet application from the financial institution backend; receiving, by the electronic wallet computer application, a pointer to an account that is eligible for provisioning to the electronic wallet application from the financial institution backend; displaying, by the electronic wallet computer application, an icon for the account on the display of the mobile electronic device; receiving, by the electronic wallet computer application, a selection of the icon; returning, by the electronic wallet computer application, the pointer to the financial institution backend; receiving, by the electronic wallet computer application, a provisioning payload for the account from the financial institution backend; and initiating, by the electronic wallet computer application, in-application provisioning of the account. in a mobile electronic device comprising at least one computer processor; accessing, by an electronic wallet computer application, a financial institution mobile application having a plurality of provisioned accounts associated with a customer, wherein the electronic wallet computer application and the financial institution mobile application are both executed by mobile electronic device; determining, by the electronic wallet computer application and based on the access to the financial institution mobile application, that there is an account out of the plurality of provisioned accounts that is eligible for provisioning to the electroni wallet computer application; displaying, by the electronic wallet computer application, a provisioning icon on a display of the mobile electronic device; receiving, by the electronic wallet computer application, a selection of the provisioning icon; receiving, by the electronic wallet computer application, login credentials for the customer; authenticating, by the electronic wallet computer application and using the login credentials, the customer with a financial institution backend associated with the financial institution mobile application; initiating, by the electronic wallet computer application, a secure session with the financial institution backend; requesting, by the electronic wallet computer application, an identification of an account that is eligible for provisioning to the electronic wallet application from the financial institution backend; receiving, by the electronic wallet computer application, a pointer to an account that is eligible for provisioning to the electronic wallet application from the financial institution backend; displaying, by the electronic wallet computer application, an icon for the account on the display of the mobile electronic device; receiving, by the electronic wallet computer application, a selection of the icon; returning, by the electronic wallet computer application, the pointer to the financial institution backend; receiving, by the electronic wallet computer application, a provisioning payload for the account from the financial institution backend; and initiating, by the electronic wallet computer application, in-application provisioning of the account.