A consent letter is not required the same way for every child's trip. We explain the rule and what to do for passport applications, solo travel and travel with a parent.
Whether you need a consent letter when taking a child abroad depends on the situation: it is requested when a married couple's child under 18 applies for a passport and one parent cannot attend, and some countries may also request it when a child travels alone. For travel with a parent, the official information does not give a definitive rule on extra documents; check separately with the destination country and the airline.
In short
- A consent letter is not the same for every family and every type of trip; it stands out mainly for passport applications and solo travel.
- For a passport application for the child of a married couple, the mother, father and child must all be present together; a consent letter is requested for the parent who cannot attend.
- If the child will fly alone, they must have their own passport, and the mother or father must inform the airline.
- For travel with a parent, the official information does not give a definitive rule; get written confirmation from the destination country and the airline.
The essence of the rule: two separate situations
A consent letter for a child's trip abroad is not tied to a single rule. Two situations stand out in the official information.
- Passport application: For the application of a married couple's child under 18, the mother, father and child must be present together. If one parent cannot attend, a consent letter is requested.
- Solo travel: Children under 18 can travel alone if they have their own passport and if their mother or father informs the airline company. Some countries may also require parental consent for solo travel; this varies by country.
For trips made together with a parent, the official information we have does not give a definitive rule on extra document requirements. So do not conclude that a consent letter is unnecessary in that case; nor should you conclude that it is necessary. Check your airline's current rule and get confirmation from the consulate of the country you are travelling to.
Short rule: Do not guess about documents. Getting written confirmation before you travel reduces the chance of a surprise at the airport.
Differences by situation: who, with whom, where
For the same child, there are three different scenarios, and the document requirement can change in each.
When getting a passport
For the application of a married couple's child under 18, the mother, father and child must be present together. If one parent cannot attend, a consent letter is requested. Clarify in advance which parent will be available on the application day. For family situations outside of a marital union, the information on this page is not sufficient; ask the institution where you will apply about the requirement.
Travel with a parent
If the child is travelling with one or both parents, the extra document requirement may be determined by the destination country and the airline. The official information we have does not give a definitive rule for this situation; so it would not be correct to say either "not required" or "required." Ask about the requirements during booking and before the trip.
Child travelling alone
The child must have their own passport. The mother or father must inform the airline company. Some countries additionally require parental consent. This requirement varies from country to country; do not speak definitively without checking the destination country's consulate or official announcement. The airline may also have its own procedures for a child travelling alone; check your airline's current rule and get the answer in writing.
Exceptions and common mistakes
The most common mistake regarding consent letters is fitting the situation into a single mold of "required" or "not required." The rule changes from situation to situation.
- Assuming it's enough if just one parent shows up: For the passport application of a married couple's child under 18, the mother, father and child must be present together. A consent letter is requested for the party who cannot attend.
- Assuming a child with a passport can fly alone: Having their own passport is one condition, not the only one. The mother or father must inform the airline.
- Applying one country's rule everywhere: Some countries require parental consent for solo travel, others may not. One country's rule is not proof for another.
- Not asking about documents when travelling with a parent: The official information does not give a definitive rule for this situation. Assuming "not required" without asking is risky.
- Forgetting about layovers: The transit country may also have its own requirement. Check every country on the route.
- Leaving the document to the last day: If something is missing, you won't have time to fix it.
Another common mistake is keeping the child's documents only on your phone. The battery may die, there may be no internet. Carry a printed copy.
Step by step: what should you do?
Following the sequence below reduces document surprises.
- Determine the situation. Is the child travelling with a parent or alone? Do they already have a passport, or will an application be made? Whether the family is within a marital union affects the application requirement.
- Plan the passport application. For a married couple's child under 18, the mother, father and child must apply together. If one cannot attend, get the consent letter prepared in advance.
- List the destination and transit countries. Ask each country's consulate about the document requirement for child travel. Parental consent may be requested for solo travel.
- Inform the airline. If the child will fly alone, the mother or father must notify the airline company. Check your airline's current rule for travel with children and get the answer in writing.
- Prepare the documents. If a consent letter is required, carry the original and a copy. Also keep the confirmation correspondence.
- Check the check-in process. To make sure the child's information is entered correctly, review the steps in the article how to do online check-in.
Note each step with a date. Writing down who you contacted, on which day, and what answer you received will help you if an objection arises at the airport.
Child documents in visa and tour planning
If the child needs a visa, the consent letter question may also intersect with the visa application. Check the documents requested in the visa file from the official page of the country you will apply to; requirements vary by country. If you are curious about long-term visa options for Schengen applications, the article the Schengen trusted traveller formula explains who may be included in this scope.
When choosing a tour, also ask about the document question before booking. Review the routes on the international tours page; read the information on the relevant tour page for participation with a child and the required documents. If you notice a missing point, ask during the booking stage.
On short holidays, people rush and document preparation is often overlooked. If you will check the article 4-day international route suggestions for the October 29 holiday, start the passport application and consent letter procedures before choosing your route.
Editorial suggestion: On your child's first trip abroad, complete your documents well before the trip and keep them all in a single folder.
Checklist before departure
In the final days before departure, check off each of the following items one by one.
- Is the child's passport ready?
- For the passport application of a married couple's child under 18, were the mother, father and child present together; was a consent letter prepared for the party who could not attend?
- If the child is travelling alone, did the mother or father inform the airline?
- Does the destination country require parental consent for solo travel? Have you obtained written confirmation?
- For travel with a parent, have you asked the destination country and the airline about extra document requirements?
- Have you checked the requirements of any transit countries?
- If needed, is the original and a copy of the consent letter in your carry-on bag?
- Is a digital copy of the documents accessible without internet?
- Have you checked the airline's current rule for travel with children?
- Have you kept the correspondence with the consulate or airline?
If even one item on this list is unclear, contact the relevant institution before your flight rather than waiting. Completing the document in advance is usually a more comfortable path than trying to solve a problem at the airport.
Frequently asked questions
Is a consent letter always required when taking a child abroad?
It depends on the situation. A consent letter is requested when one parent cannot attend the passport application of a married couple's child under 18; some countries may also request it when the child travels alone. For travel with a parent, the official information does not give a definitive rule; check your airline's current rule and get confirmation from the destination country.
When is a consent letter requested when getting a passport?
For the application of a married couple's child under 18, the mother, father and child must be present together. If one parent cannot attend, a consent letter is requested. Clarify who will attend before the application.
Can a child under 18 fly alone?
Yes, conditionally. The child must have their own passport, and the mother or father must inform the airline company. Some countries may additionally require parental consent.
Which countries require consent for solo travel?
This varies by country, and it would not be correct to give a single list. Get written confirmation of the requirement from the consulate or official announcement of the country you are travelling to and transiting through.
I will be travelling with my child; do I need to get a consent letter?
The official information we have does not give a definitive rule for this situation. The extra document requirement may be determined by the destination country and the airline. Before you travel, check your airline's current rule and get confirmation from the consulate of the country you are travelling to.
Do I need to carry the consent letter with me?
If the document is required, it is recommended to carry the original and a copy with you. A printed copy helps against phone battery or internet issues. Also keep a digital copy separately.
What should I do to inform the airline?
If the child will travel alone, the mother or father must notify the airline company. The procedure may vary from airline to airline. Check your airline's current rule during booking and get the answer in writing.
Sources
- Republic of Turkey Ministry of Foreign Affairs Consular Services — konsolosluk.gov.tr
My Travel Team
Travel Editor
The My Travel team prepares up-to-date travel, visa and tourism information and guides.



