Abstract: A method of registering a user with a third-party service using an identity verification process, comprising receiving configuration data from the third-party service. The configuration data comprises a user number associated with the user of the third-party service; and application data associated with the third-party service. The configuration data is used to generate a uniform resource identifier, URI, for an application associated with the identity verification process, distributing the URI to a device associated with the user; and receiving a notification from the device indicating that the user has accessed the URI. In response to receiving the notification, at least part of the configuration data is sent to configure the application on the device in order for the user to perform the identity verification process, associated with the third-party service, to register with the third-party service.