If you are a member of Costco, refer a friend and both of you get a $10 Costco Cash Card. Just take your friend with you the next time you visit Costco, present this form at the membership desk and after they sign up, you’ll both get the $10 Cash Card. If you want to be a member of Costco, find a friend that is a member and have them go with you to sign up. Don’t forget to print and take this form! This offer expires August 31, 2015.