How will I receive my credit for a referring another customer? October 31, 2018 21:49 Updated Your referral voucher will be emailed to you and added to your customer profile. Related articles How does the referral program work? Can I earn a referral voucher for friends or family that are going on the same cruise with me? Is there a limit to how many referral vouchers I can earn? What information is required when pre-registering with the cruise line? What is a group cruise?