No, Royal Caribbean strictly prohibits the use of photocopies or digital images of birth certificates for boarding. If you are a U.S. citizen traveling on a "closed-loop" cruise (one that begins and ends at the same U.S. port) and choose not to use a passport, you must present an original state-issued birth certificate or a certified copy with a raised seal. Hospital-issued "souvenir" certificates are also not accepted. This policy is in place to comply with U.S. Customs and Border Protection (CBP) regulations for verifying citizenship. While children under 16 only need the birth certificate, adults using one must also provide a valid government-issued photo ID, such as a driver's license. Royal Caribbean continues to "strongly recommend" using a passport for all sailings, as a birth certificate will not allow you to fly home from a foreign port in the event of an emergency, but if you do use a birth certificate, it must be the physical, official document.