rebate mule 

The person (usually a friend or family member) you have a rebate check sent to when you've already collected on that rebate yourself; often necessary for manufactuer's rebates on liquor, which are limited to one per household.

I already hit this $10 rebate for Canadian Club a month ago, so I'm gonna use Tom as my rebate mule for this new bottle.

rebate mule by Lincoln Damage October 18, 2012