If children are not travelling with both their parents, (ie: if they are travelling alone, or with another adult), this form can be used to give permission. For what are you asking permission?Make sure the consent letter clearly indicates whether the permission is to travel out-of-state or abroad. Know what documents a child needs to travel to or from the U.S. All children, including infants, must have their own travel documents. Do bring government issued identification and the child's birth certificate. DO NOT sign this consent form before meeting with the Notary Public. A Travel Consent Form is a letter of permission for travel is a document where a parent or guardian acknowledges that their minor will be traveling alone. Some parents are able to travel absent notarized letters if their order of custody gives them passport authority. How do I write a consent letter for my child to travel? The most important is a notarized letter of consent from the non-traveling parent.