Is there a limit to how many referral vouchers I can earn? November 09, 2018 16:51 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? How do I pre-register with the cruise line? What if my sailing is cancelled? Are Loyalty Club benefits combinable with other promotions?