TSA does not require children under 18 to provide identification when traveling within the United States. Contact the airline for questions regarding specific ID requirements for travelers under 18.
Do you need a notarized letter to travel with a child alone? In most cases of a single parent traveling out of the country with their child, the answer is yes you do need a notarized consent to travel letter. You can download your own customizable travel consent letter here.
You don't need any documentation. The only time you would need a birth certificate is if you were flying with them as a lap child. I just flew 3 southwest flights with my four year old and he was only asked what his name was by TSA. Didn't have to show anything.
How do I write a consent letter for my child to travel? List your child's name, birth date/place, and passport details. Provide the parent's/guardian's name, custody information, and passport details. Add contact information for the non-traveling parents/guardians. Detail the child's destination and dates of travel.
Children under 18 don't need an ID to fly domestically but do need a passport for international flights.
Do you need a notarized letter to travel with a child alone? In most cases of a single parent traveling out of the country with their child, the answer is yes you do need a notarized consent to travel letter. You can download your own customizable travel consent letter here.