Is there a limit to how many referral vouchers I can earn? November 13, 2018 20:27 Updated There is no limit to the amount of vouchers you can earn and apply to a future reservation. Related articles How does the referral program work? How will I receive my credit for a referring another customer? What is the Loyalty Club Membership Program? When will I get my shore excursion voucher? What is my Post-Booking Bonus onboard spending amount?