Carry a child travel consent letter whenever a minor sails without both legal parents present. CBP's own guidance is that a child travelling with one parent should have a notarized note from the other, and a child travelling with grandparents or friends should have one signed by both parents. You may never be asked for it on a closed-loop Caribbean sailing, but if you are, no other document substitutes.
⚡ The Quick Answer
- ✓ Carry one whenever a minor sails without both legal parents present.
- ✓ Grandparents, aunts, family friends and one parent alone all count.
- ✓ Notarization is not always required, but it makes the letter far harder to question.
- ✓ A different surname from your child makes a letter more important, not less.
- ✓ Bring a copy of the absent parent’s ID with it where you can.
This is not a cruise line invention. It exists because international borders take child protection seriously, and a ship calling at foreign ports is crossing them.
Here is when you need one, what it should say, and the situations that catch families out.
🧑🤝🧑 When You Need One
Carry one
One parent sailing
The most common case by far, and the one most often overlooked because it feels normal.
Carry one
Grandparents or relatives
Any adult who is not a legal parent, even close family, should have written permission.
Carry one
Divorced or separated parents
Bring custody documentation as well. This is the scenario officials scrutinize most.
Worth it
Different surnames
Not strictly a consent situation, but a letter plus a birth certificate answers the question before it is asked.
The honest position is that on a closed-loop Caribbean sailing you may well never be asked. The reason to carry one anyway is that the cost of having it is a printed page, and the cost of needing it and not having it is your holiday.
✍️ What the Letter Should Contain
- The child’s full legal name and date of birth, exactly as they appear on their travel documents.
- The full name of the absent parent or parents, with a contact phone number and email.
- The full name of the accompanying adult and their relationship to the child.
- The specific trip: the ship, the sailing dates, the departure port and the ports of call.
- A clear statement of consent to travel, and to necessary medical treatment if you are comfortable including it.
- The signature and date of the consenting parent, notarized where you can arrange it.
🚨 Notarize it if you possibly can
An unnotarized letter is better than nothing and is often accepted. A notarized one is considerably harder for anyone to question, and notarization is inexpensive and quick. If the sailing matters, spend the small amount and the half hour.
Get the Document Checklist
Consent letters, birth certificates, photo ID and who needs which — every document your family needs at the terminal, on one printable page.
🧓 Grandparents Taking the Grandchildren
Grandparent-and-grandchild cruises are lovely and increasingly common, and they are exactly the case where documentation matters most, because the accompanying adults are not the legal parents and the surnames frequently differ.
A letter from both parents
Naming the grandparents, the ship and the dates. Notarized if at all possible.
A copy of each parent's ID
It lets anyone checking match the signature to a document without phoning home.
Medical consent and insurance
Written authority to seek treatment, plus the policy number and any allergies or medication in writing.
Reachable parents
Numbers that work internationally, and an agreed time the parents will be contactable each day.
✅ Practical Notes
- Bring paper. A photo on a phone is a poor second when someone wants to examine a signature.
- Bring two copies. One in the carry-on, one in the cabin safe.
- Keep it with the birth certificates, not separately. They get asked for together.
- Check your cruise line’s own wording. Some publish a form or specific requirements for unaccompanied minors and guardians.
- Date it close to the sailing. A letter written two years ago invites more questions than it answers.
🔎 This is general guidance, not legal advice
Requirements differ by cruise line, by destination country and by your own custody arrangements. If there is a custody order in place, follow what it says and check with your attorney. For anything unusual, confirm with your cruise line in writing before you sail.
Booked? Here is the part they keep.
A free printable cruise journal for ages 6 to 12 — then port packs for the exact stops on your itinerary.
❓ Frequently Asked Questions
🔗 Sources & further reading
Requirements vary by country and by cruise line. Confirm before you sail.
- CBP, children travelling without both parents — official guidance on notarized consent notes
- CBP, before your trip — document guidance for US citizens leaving and re-entering
Planning a family cruise? 🚢
The Passport Pal is a printable cruise journal built for ages 6 to 12, with port-specific packs for the stops on your itinerary.
Get the Free Journal 👉