I was just checking out the latest Sephora codes on Retailmenot and saw this rebate offer. This only applies to in-store purchases made between 9/1 and 10/31. The form is HERE and it states that your rebate will be "delivered to your email address," so I'm not sure if that means you will receive a check, or if you can elect to have it deposited into your PayPal account. Per the form, all that is required for this rebate is a valid email address and your original receipt. Not valid on purchases made at Sephora Inside JCPenney locations.
Every little bit counts, right?