We leave for our cruise in four weeks. I am not sure whether my husband's birth certificate is the right one needed. Me and my son's birth certificates are from Pennsylvania, have a seal and on the back the certificate says something about a certified copy. However, my husband's birth certificate is from massachussetts and its a xerox copy but then on the bottom is a green seal and it also says something about being certified. I am alittle nervous because his birth certificate is just a xerox copy. We don't travel much out of the United States so I really don't want to spend money on passports. Can someone please tell me if I have the right certificates needed. Thank you all so much!