text: Paper or card is generally used, although plastic may be used instead for durability. Some have a barcode or magnetic stripe for keeping simple data stored on them; higher end tickets include chips that store more data and prevent counterfeiting.
  A paper ticket often is perforated so it can be separated into two parts, one (the ticket stub) to be kept by the customer, and one to be kept by the ticket controller. Whether or not one can leave and reenter with the customer's ticket stub only varies. It may not be allowed to avoid subsequent use of one ticket by multiple people, or even simultaneous use by giving the ticket to someone before the ticket check (if this is physically possible), but it may also be allowed, e.g., in a movie theatre to allow the stub holder to use the facilities (restroom, telephone, water fountain) or buy, during a movie, a snack or drink before the ticket check and reenter.
  A ticket may be printed in advance, or fully or partly printed when issued, or it may be a printed form that is completed in handwriting (e.g., by a train conductor who does not carry a ticket machine, but just a supply of forms and a pen).
  Security issues
  Counterfeit tickets are a problem at high-priced concerts and other events, so holograms are used on tickets for the FIFA World Cup, Olympic Games, Super Bowl, and other high-profile events.