Anyone knows, what's going to happen, if I'll combine this coupon with mail-in rebate?
And after that submit my rebate request through internet without mailing the paper receipt to Walgreens?
Is it the way to be paid for getting of free stuff, or it's not?

For example, I buy cosmetics for $20, pay with coupon only $15, and claim mail-in rebate for $20, because $20 is the price of cosmetics indicated on the receipt.