A computer-implemented method is provided for generating an access code to an event, comprising: a user obtaining an access right to the event from an access provider; the user authenticating themselves to the access provider using a legal form of identification comprising one or more biometric identifiers and the user generating an access code using a mobile device wherein the user provides biometric data and if approved, the access code is generated as a combination of the access right to the event, the user and the mobile device. By using these three data inputs, a substantially unique access code is generated. Complicated authentication, such as facial recognition at an entrance to the event, is no longer required, as it has already been performed before approaching the access code reader.