How will I receive my credit for a referring another customer? January 04, 2019 19:16 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? Is there a limit to how many referral vouchers I can earn? How does the referral program work? Why should I book with American Airlines Cruises? Can I use my award miles to book a cruise?