Exchange Tickets are tickets that can be obtained by using CP, which are, in turn, obtained primarily by completing missions.
There are three types of Exchange Tickets: Exchange Tickets for Avatars, Exchange Tickets for Accessories, and Exchange Tickets for Craft Items. Each ticket may be exchanged for one item.
Exchange Tickets for Accessories and Exchange Tickets for Craft Items can be obtained with 1000CP, while Exchange Tickets for Avatars can be obtained with 5000CP.