All unused onboard credit will expire at 10:00 PM on the final night of the cruise. MGM Rewards Relationship Benefits are not combinable with any other offer or promotion, including, but not limited to, Standard Group, Interline, Travel Agent, Travel Agent Friends & Family, and Net Rates. Onboard credits are not redeemable for cash and are non-transferable. These benefits do not apply to members sailing using a cruise certificate or sailing as part of a group program. MGM Rewards Onboard Benefits are only available when sailing onboard a Royal Caribbean or Celebrity Cruises Vessel using MGM Rewards Quarterly Exclusive Cruise Offers, Annual Complimentary Cruise Benefit or its cruise fare trade-in value. Benefits must be requested at the time of the initial booking and at least ten (10) days prior to the cruise’s departure date. The Onboard Credit is limited to one per qualifying MGM Rewards member per sailing.Tier benefits are nontransferable, subject to validation of current MGM Rewards tier and are non-combinable.