Taking cruise is different, it is not considered international travel. your kid can use birth certificate. 2 years ago, my family went cruise to mexico, my children (3 and 2 at that time), used their BC.
Taking cruise is different, it is not considered international travel. your kid can use birth certificate. 2 years ago, my family went cruise to mexico, my children (3 and 2 at that time), used their BC.