Cashback MatchTM: Only from Discover, as of September 2017. After the first 12 consecutive billing periods that your new account is open, we will match all of the cash back rewards you've earned and apply them to your account in the following one or two billing periods. If your account is closed or no longer in the cash back reward program at the time we calculate your potential award, your cash back will not be matched. You've earned cash back rewards when they have posted to your account by the end of the 12th consecutive billing period. This promotional offer may not be offered in the future. This exclusive offer is available only to new cardmembers.