<p>^on second thought, that’s a good idea. Especially if your minor is international, send them with copies of your drivers’ licenses, their birth certificate, and a letter describing why they are traveling, where to and from, the address they will be staying out, your phone number, and sign it. Include any other important documents [student visa, etc.] That’s what my parents did [well, minus the student visa- we’re american citizens so we included my parents’ work visas], and it really helped at customs and such. At the very least, a letter is handy.</p>