request is completed. These will normally include the airline's own record locator, replies to special requests, and advice on ticketing time limits. While normally sent by the airlines to an agent, it is also possible for an agent to send a VR to an airline. In more recent times, many governments now require the airline to provide further information included assisting investigators tracing criminals or terrorists. These include: Passengers' gender Passport details - nationality, number, and date of expiry Date and place of birth Redress number (if previously given to the passenger by the US authorities). All available payment/billing information. The components of a PNR are identified internally in a CRS by a one-character code. This code is often used when creating a PNR via direct entry into a terminal window (as opposed to using a graphical interface). The following codes are standard across all CRSs based on the original PARS system: - Name 0 Segment (flight) information, including number of seats booked, status code (for example HK1 - confirmed for one passenger) and fare class 1 Related PNR record ids. 2 PNR owner identification (airline, CRS user name and role) 3 Other airline Other Service Information (OSI) or Special Service Request (SSR) items 4 Host airline OSI or SSR items 5 Remarks 6 Received from 7 Ticketing information (including ticket number) 8 Ticketing time limit 9 Contact phone numbers Storage The majority of airlines and travel agencies choose to host their PNR databases with a computer reservations system (CRS) or global distribution system (GDS) company such as Sabre, Galileo, Worldspan and Amadeus. Privacy concerns Some privacy organizations are concerned at the amount of personal data that a PNR might contain. While the minimum data for completing a booking is quite small, a PNR will typically contain much more information of a sensitive nature. This will include the passenger’s full name, date of birth, home and work address, telephone number, e-mail address, credit card details, IP address if booked online, as well as the names and personal information of emergency contacts. Designed to "facilitate easy global sharing of PNR data," the CRS-GDS companies "function both as data warehouses and data aggregators, and have a relationship to travel data analogous to that of credit bureaus to financial data.". A canceled or completed trip does not erase the record since "copies of the PNRs are ‘purged’ from live to archival storage systems,