I was very against getting passports because of the cost. My family and I was going to use our bc's. Well, I was told that I needed to take my marriage license as well. So I got to thinking, since this is my second marriage, will I also need my divorce decree? So I called US Customs and explained the situation. I was born a Dentler, married a Witmer, divorced, and now am married to an Oberholzer. The answer was yes, I would need a paper trail. A bc, marriage certificate, divorce decree, and my second marriage certificate. I really didn't want to carry all that around. So despite the cost, my husband and I applied for passports and got them in 3 weeks. Our children will still use their bc's. I'm sure that not everybody may have had problems with not having the entire paper trail, but I'm not taking the chance.