There was a discussion on a NJ Radio station a while back how Target is not letting "Frequent Buyers and Returners" keep returning things. They are asking for DLs and if you are profiled you cannot return any more.

They also will only put the money back on the charge card it was charged against. SO you in efffect could not charge up a storm on a mileage earning cc and then return it on another cc.

Cheers