Half-term comes round, the grandparents offer to take the children to Spain for a week, and everyone focuses on passports and travel insurance. The document that actually causes trouble at the gate is the one nobody mentions: a signed letter from the people with parental responsibility saying the trip is authorised.
There is no official form for it. UK law does not prescribe one, which is exactly why so many families turn up without anything. What most airlines and border officials expect is a dated, signed letter covering the child, the trip and the adult travelling with them — the shape of a standard child travel consent form, filled in properly and printed before you leave the house.
What the law actually requires
The rule is about permission, not paperwork. According to GOV.UK, you must get permission from everyone with parental responsibility before taking a child abroad, or from a court if agreement isn’t possible. Taking a child out of the UK without that permission can amount to child abduction, and the Government has been blunt about it in its own guidance on knowing the law around parental child abduction.
Who holds parental responsibility matters more than most people assume. Mothers have it automatically. Fathers have it if they were married to the mother at the time of birth or are named on the birth certificate, and otherwise can acquire it by agreement or court order. GOV.UK sets out what parental rights and responsibilities cover, and confirms that major decisions — moving abroad with a child being the clearest example — need written agreement from everyone who holds it. Scotland has its own rules.
There is one exception worth knowing: where a child arrangements order says a child lives with you, you can usually take them abroad for up to 28 days without the other parent’s consent, unless an order says otherwise.
Why the letter still matters when nothing requires it
This is where families get caught out. The absence of a prescribed form does not mean nobody will ask. Airlines, carriers and immigration officers at the destination can and do request written evidence, and their view of what counts as adequate is not governed by UK law at all — it is governed by the destination country’s rules and the carrier’s own policy. The Foreign Office has published country-specific notes on this for years – its guidance on travelling with children to Cyprus is one example of a destination setting out its own documentary expectations.
A grandmother at a Spanish passport desk with a child who shares none of her surname has no way of demonstrating the trip was agreed unless she is carrying something that says so. Border staff are trained to pause in exactly that situation. A single sheet of paper turns a long conversation in a side room into a thirty-second check.
What to put in it
Keep it factual and complete. A consent letter that works should include:
- The child’s full name, date of birth and passport number
- The names, addresses and contact numbers of everyone with parental responsibility who is giving consent
- The travel dates, destination and return details
- The name of the accompanying adult and their relationship to the child
- A clear statement authorising the trip
- An emergency contact who will be reachable throughout
- Signatures and the date
Two details are worth adding. Note any medical consent you want the accompanying adult to be able to give, and if there is a child arrangements order in place, travel with a copy of it alongside the letter.
For international trips it is sensible to have the signatures witnessed, or verified by a solicitor. That isn’t a validity requirement in the UK, but it makes the document considerably harder to question at a border, and it costs very little.
Separated parents: do it even when you get on well
The most common mistake is assuming that an amicable co-parenting arrangement makes the letter unnecessary. It doesn’t, for two reasons.
The first is the practical one above: the official checking the passport doesn’t know your family. The second is that a consent letter protects the travelling parent as much as the child. A dated document signed by the other parent is evidence that the trip was agreed, which matters enormously if the relationship later deteriorates and the holiday gets reinterpreted.
Ask early, too. A consent letter requested in July for an August trip is a formality. The same request made the night before a flight reads as pressure, and that is how holidays turn into arguments.
Where to get the document
Plenty of families write the letter themselves, and a well-drafted one from scratch is perfectly adequate. The risk with writing it cold is omission — forgetting the passport number, or not naming all the consent-givers — and an incomplete letter is close to useless when someone is actually scrutinising it.
Online document platforms produce a structured version with the standard fields prompted, which is a reasonable way to avoid gaps if you’re putting it together the week before travel. For an ordinary family holiday that is usually all that’s needed. Where there’s a live custody dispute, a court order restricting travel, or a risk the other parent will object, it’s worth speaking to a family solicitor rather than relying on a template — the stakes there are not paperwork stakes.
One sheet of paper
The honest summary is that this is a very small job that people skip because no official letter tells them to do it. Nobody at the passport office hands you a consent form. No airline emails a reminder.
So it falls to whoever is organising the trip to think of it, usually around the same time they’re worrying about whether the pushchair counts as hold luggage. Print two copies, give one to the travelling adult and keep one at home, and the odds of a difficult half hour at the border drop to almost nothing.