The paper ticket is now a thing of the past.
On 1 June 2008, the industry moved to 100% electronic ticketing (ET), one of IATA's Simplifying the Business projects.
Apart from substantial cost savings for the industry (up to US$3bilion per year), ET is also more convenient for passengers who no longer have to worry about losing tickets and can make changes to itineraries more easily.
More on the history of ticket and move to electronic ticketing
E-ticketing Legal Notices
The liability of airlines towards passengers in cases of incidents and accidents are defined in the "Conditions of contract and other important information". This document details passenger rights with regard to death or bodily injury, loss of or damage to baggage, and for delay. It also defines passenger rights and obligations for denied boarding, check-in times, baggage and the transport of dangerous goods.
There may be some regional adaptation of the ticket notice. See: www.iatatravelcentre.com/ticket