Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for switching tickets between attendees during an event. The method may include the actions of receiving ticket information from multiple users attending an event, determining that tickets for a particular section are held by one or more of the multiple users, providing a switch offer to the particular user to switch a ticket of the particular user with a ticket held by one of the one or more of the multiple users, receiving a switch request for the switch offer, providing switch offers to each of the one or more of the multiple users, receiving an acceptance of the switch offer from a first user of the one or more of the multiple users, and providing an instruction to cancel the switch offers to other users of one or more of the multiple users.