I received a 1099-MISC from Discover Bank and I only have a Discover Credit Card which I have maximized the cash back each quarter and sent some referrals to friends. I called the number listed on the 1099 and it reached Disc Card and the rep told me it was possibly from making over $600 in Cash Back but she couldn't tell me what it was from. Has anyone received 1099's from Discover like this? I haven't had a bonus from them because my card is over 10 years old so I know it's not that.