How do I write a consent letter for my child to travel? We will be sharing some family travel tips about what documentation is needed, such as a travel consent letter, for international travel with a minor.Hi, My ex has finally agreed to give me permission to take LO on holiday next year, hes asked me to write the letter out. I was asked to present the consent form at immigration when I was returning home from the Bahamas with my grandparents. I was 15 at the time. It's just a freeform letter that says your children have permission to travel with their other parent. The most important preparation for traveling with a child out of state after divorce is obtaining consent from the child's other legal guardians. 1. Document Header - Begin with a clear and descriptive title, like "Child Travel Consent Form. Download our free PDF or Microsoft Word consent form for traveling with one parent. Bringing a letter helps you avoid travel delay and legal issues.