I'm not sure what type of comp tickets you're talking about, but if these are the One-Day Park Hopper tickets (sometimes referred to as "Chip 'n' Dales," given to CPs and temp hires), those can only be used by active employees of TWDC. One your employment ends, these tickets are not usable unless you re-join the Company before the two-year expiration mark. To use the Chip and Dales, you have to also scan your Main Entrance Pass first. The rules vary depending on your status with the Company, but as far as CPs are concerned, they generally only get the MEP and the Chip and Dales. The Guest Passes and Comp Tickets give to FT and CR (Casual Regular a.k.a Part-Time for those unaware) are different.