My husband will become a citizen next Saturday. He will receive a drivers license type card, showing he's been naturalized. His mother and father were both naturalized a few years back. Those cards are VERY valuable, and extremely hard to replace if lost. We are taking NO chances, and getting us ALL passports for future travels. That way, ALL we'll need is a drivers license and passport. No additional papers to tote along. That way, we run no unnecessary risk of losing his card. But yeah, if that is all you have it will do. Just be SO very careful with it..