This paper describes two different approaches to use Near Field Communication (NFC) enabled mobile phones in a ticketing system dedicated to event management: (i) a offline version where some equipments are not connected to the Internet ; (ii) a online version where an Internet connection is available on all the equipments composing the infrastructure. These two propositions are compared so as to evaluate their pros and cons in terms of user experience, security, economical aspects, reliability and speed of use. We also identified a scenario with six use cases and decided to focus on ticket issuance and ticket presentation.