Did she change name on her driver's license? If so, depending on the cruise, that might do the job for her along with either birth certificate or passport as proof of citizenship. The bottom line is to make a call to DCL and ask what documents can rectify the situation. You are not the first person to post this sort of issue, so I'm sure they can tell you exactly what you'll need. They are used to birth certificates not matching driver's licenses...so if your cruise is to the Bahamas or Caribbean, that combination will work. Of course, she probably can't find a birth certificate either.