What International Travel Documents Kids Actually Need
Every child needs their own passport, and many countries expect a signed consent letter when a child isn't traveling with both parents.
Photo: Mattes · CC BY-SA 3.0 · source
A common assumption among first-time family travelers is that children can ride on a parent’s passport, the way they might on a driver’s license or an insurance policy. They can’t. Every child, including infants, needs their own passport for international travel — and depending on who they’re traveling with, that’s often just the first document required, not the last.
Every child needs their own passport
There’s no exception for age here. A newborn flying internationally needs a passport with their own photo, issued in their own name, just like an adult. Passport agencies in most countries process infant passports the same way as adult ones, though the photo requirements (a plain background, no other people in frame, eyes open) trip up more parents than any other part of the process.
When a consent letter comes into play
The document that catches families off guard is the parental consent letter, and it isn’t required for every trip — only when a child is traveling without both custodial parents present. If a child is traveling with just one parent, crossing a border alone, or traveling with a grandparent, aunt, uncle, or family friend, many countries’ border agents expect written, notarized permission from the parent or parents who aren’t there. The requirement exists specifically to make international child abduction harder to carry out quietly, so agents are trained to ask about it even when nothing about the family looks unusual.
A workable consent letter is short: it names the accompanying adult, states the travel dates and destination, and includes a line along the lines of “I acknowledge that my child is traveling outside the country with [name] with my permission,” signed by the non-accompanying parent. When a child is traveling with a guardian or entirely alone, the expectation is usually that both parents sign. Because requirements differ by destination — some border agents ask to see one routinely, others rarely check — the safest approach is contacting the destination country’s embassy or consulate ahead of the trip rather than assuming last year’s rules, or a friend’s experience with a different country, still apply.
Where this intersects with entry paperwork like Canada’s eTA
Consent letters are a family-law and border-security matter, separate from whatever entry authorization a country requires — but families often deal with both at once. For Canada specifically, every visa-exempt child flying in needs their own Electronic Travel Authorization (eTA) in addition to any consent paperwork; a child isn’t automatically covered by a parent’s approved eTA. get-eta.com’s family application checklist — a service operated by the publisher of Naked News, not a government one — walks through applying for each family member’s eTA separately using each person’s own passport, which is the step families most often get wrong when they try to speed through several applications back to back.
The practical takeaway
Two separate document tracks apply to traveling children: an eTA-style entry authorization (or visa) that varies by destination, and a consent letter that’s about who the child is traveling with, not where they’re going. Sorting out the first without checking the second is the more common way a family gets stopped at check-in — not turned away at the border, but not permitted to board the flight in the first place.
For the entry-authorization side specifically, it helps to know how these electronic travel authorization systems compare across countries before assuming a rule that applies to one destination applies to all of them.