Trading the gamefly disc with my disc?

ok say i have Smackdown vs raw 08 and i order svr09 from gamefly which i have right now and i trade the two disc and send it back to gamefly with the 08 one... what do u think woudl happen once when my halo 3 disc got badly scratched i rented the game from blockbuster and traded them out i never got caught lol... show more ok say i have Smackdown vs raw 08 and i order svr09 from gamefly which i have right now and i trade the two disc and send it back to gamefly with the 08 one... what do u think woudl happen

once when my halo 3 disc got badly scratched i rented the game from blockbuster and traded them out i never got caught lol do u think it will be the same for gamefly
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