If you are American citizens and the cruise begins and ends in the same U.S. port, then you do not need passports. loop cruises do not require passports. See site below and read section on Loop cruises. You can call the cruise line and they will tell you the same thing. If a person owes more than $2,500 in back child support, or is wanted for a serious felony and has had their name put on a hold list by a law enforcement agency, he cannot get a passport. Nothing else can stop a person from getting a passport. Of course, the person owing the child support needs to put the responsibility of caring for his child before his desire to take a cruise.