Every U.S. citizen, including infants, must have a valid passport to visit foreign countries. Although passports are not required if you are traveling to Mexico, Canada and some Caribbean islands, it is still wise to have them as it might make your trip through customs and immigration much easier. You may obtain an application for a passport at your local courthouse or at any official U.S. Passport Agency. Passports are valid for five years for children under 18 and for 10 years for adults. Make plans to get your passports early, as it can take six weeks or longer during peak travel times to obtain them.
Some countries also require visas.
A visa is an official stamp in your passport that allows you to visit a specific foreign country. Your travel agent should be familiar with these requirements. It is a good idea to photocopy important documents such as medical and immunization records that you might need. Due to the growing number of child custody problems between divorced couples, any parent traveling alone with a child should have a notarized document from the other parent stating that the child has permission to leave the country. Some countries will not allow the child to enter the country without this document.