How will I receive my credit for a referring another customer? November 13, 2018 20:27 Updated Your referral voucher will be emailed to you and added to your customer profile. Related articles Can I earn a referral voucher for friends or family that are going on the same cruise with me? How does the referral program work? Is there a limit to how many referral vouchers I can earn? Can I make changes to a guarantee room? Are special rates available if I sailed the cruise line before?