Unfortunately not, best bet is to have someone you trust who has ALREADY redeemed one check it for you. If you try to redeem an Emblem you've already got, it will say "You already have this offer". Basically 4 outcomes of inputting Emblem Codes. • SUCCESS! You've added blah blah blah to your account. (aka YOU JUST REDEEMED THIS CODE aka USED CODE) • ERROR: You've already applied this code to your account. (aka YOU'VE ALREADY REDEEMED THIS CODE aka USED CODE) • ERROR: You already have this offer. (aka YOU ALREADY REDEEMED ONE OF THESE EMBLEMS BEFORE aka UNUSED CODE) • ERROR: This code has already been redeemed on another account. (aka SOMEONE ELSE HAS REDEEMED THIS CODE aka USED CODE)

the only way to know is to redeem it