Finding out what item a coupon code is generated for,

Hello.

We're currently looking at implementing a system where we will use your Coupon Codes to give items to players.

My question is if it's possible to figure out what will be rewarded when the code is redeemed before the code is used. We would like to be able to prevent codes from being used if we already know that the player owns the item that would be rewarded from the code.

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