Amadeus Ticket Changer (ATC) is the Amadeus Solution to automate the calculation necessary to reissue a ticket. In the past complex reissue calculations had to be carried out manually in a time consuming process to travel agent. Now Amadeus Ticket Changer (ATC) is capable to calculate instantly the price difference including Fare, Tax, and determine the appropriate penalties amount, residual value and update the PNR with the correct additional total amount and prevents ADMs generated by the airlines for misleading reissue, if Carrier has filed their ATPCo Category 31. Amadeus Ticket Changer (ATC) is a complete solution enhancing the reissue process in FOUR simple steps: 1- PNR retrieval........................ (Existing reservation) 2- Rebooking............................ (New Flight, Class, Date) 3- Pricing.................................. (Recalculate of Fare/Taxes, Penalties) 4- Document Preparation........ (Document Issuance) New Features Amadeus has introduced a new feature with ATC, which allows all Travel Agents to perform an end-to end fully automated reissue, for carriers that haven't filed their ATPCo Category 31. It means no more ATC message ''CAT31 NOT FILED'' instead, the reissue panel will display a new appended message ''VC CATEGORY NOT FILED BY CXR -- REISSUE NOT GURANTEED *4*'' to identify this process.