A method for facilitating a user to subsequently access, via an application executed by a user device of the user, an account for one or more services provided by a service provider, wherein said access is controlled based on biometric verification of the user performed, at least in part, at the user device, wherein the method comprises: obtaining reference data from a storage device, wherein the storage device stores biometric data for the user suitable for use in the biometric verification of the user, and wherein the reference data is suitable for use in one or both of: (a) subsequent access of the biometric data from the storage device and (b) authentication of the biometric data; and providing the reference data to an access system used by the service provider so that the access system can associate the reference data with an identifier associated with the user.