Refer a friend to join Costco and you will each receive a special offer *
* Referring and new member must both be present at the time of sign-up. Executive Members who refer a friend to join as an Executive Member will each receive a $ 40 Shop Card. Gold Star or Business members who refer a friend to join as a Gold Star or Business member will each receive a $ 20 Shop Card. Not valid with any other offer. See Membership Counter for details.