Have a question about how we work?
Speak to the team about our approach, our fees, or what to expect from instructing us.
Call 020 8757 5751 Contact Form
Free Assessment

How to complete the MN1 form to register a child as a British citizen

by | 15 Oct 2026

Two children in London holding British flags, illustrating the MN1 form to register a child as a British citizen.

The MN1 form is the application used to register a child under 18 as a British citizen. An application made under the wrong route, or without the evidence that route needs, may be refused. This post provides an overview of each section of the online MN1 form to register a child as a British citizen.

Key overviews

  • The MN1 form is completed online, as “Apply for registration of a child under 18 as a British citizen”. Brothers and sisters can be added to the same application.
  • The category chosen at the start decides the requirements. Some routes are entitlements under the British Nationality Act 1981, and others are at the Home Secretary’s discretion.
  • A child aged 10 or over must be of good character. The character questions and the convictions list apply to that child.
  • Two referees and a parental consent letter support each child’s application. The documents list at the end of the form names everything that must be uploaded.

Contents

What is the MN1 form?

The MN1 form is the Home Office application to register a child under 18 as a British citizen. Most applications are made online, where the form appears as “Apply for registration of a child under 18 as a British citizen”. A paper version of Form MN1 is also published on GOV.UK.

The Home Office tests the child’s age on the date it receives the application, and the child must be under 18 on that date. The Form MN1 guidance states that once a child reaches 18, they must apply as an adult. An adult applies by registration where they have an entitlement, or by naturalisation. Several child routes use a different form. Form T is used under section 1(4) by a child born in the UK who has lived here for their first 10 years. Form UKF is used by a child who would have been British automatically if their parents had been married.

A child who is already British does not need to register at all. Where a parent was British or settled at the time of a UK birth, the child holds British citizenship by automatic acquisition. Only children who are not already British should be included, according to the guidance.

Which MN1 category applies to the child?

The first personal question asks the applicant to choose the category the child is applying under. Under the British Nationality Act 1981, some children have an entitlement to be registered, where the requirements are met. Other children may be registered at the Home Secretary’s discretion under section 3(1).

The MN1 guidance covers these routes:

  • section 1(3), a child born in the UK whose parent has since become settled in the UK or a British citizen;
  • section 1(3A), a child born in the UK on or after 13 January 2010 whose parent has since joined the UK armed forces;
  • section 3(2), a child born abroad to a parent who is British by descent and lived in the UK for 3 years before the birth;
  • section 3(5), a child born abroad to a parent who is British by descent, where the family has lived in the UK for the last 3 years;
  • section 4D, a child born abroad on or after 13 January 2010 to a parent serving in the UK armed forces outside the UK;
  • section 4F, a child who would meet section 1(3), 3(2), 3(5) or 4D if their parents had been married; and
  • section 3(1), registration at the Home Secretary’s discretion.

The choice between section 3(2) and section 3(5) has a lasting effect. A child registered under section 3(2) is a British citizen by descent and cannot pass citizenship automatically to children born abroad. A child registered under section 3(5) is a British citizen otherwise than by descent.

Section 3(1) sits alongside the other registration as a British citizen routes. The guidance names the situations where the Home Office will normally register a child. These include a child applying in line with a parent who is British or becoming British. They also include a child with more than 5 years’ lawful residence who has held settled status for at least 12 months. The parents must also meet the guidance’s residence, settlement and consent conditions. A child adopted abroad by a British parent is another example.

The guidance invites the applicant to state which section they think applies. Whytecroft Ford’s immigration team can confirm the correct section before the form is started.

What to prepare before starting the MN1 form

The applicant needs the child’s details, both parents’ details and two referees’ details ready before the form is opened. The guidance lists the documents by route. Evidence of identity can be the child’s passport or travel document, or the child’s birth certificate showing the parents’ names.

For most applications, the following are needed:

  • the child’s full birth certificate, showing the parents’ names;
  • the child’s passport, and for a child living in the UK, the passport they entered with and any later passports;
  • the parents’ marriage or civil partnership certificate, where they are married;
  • evidence of the parent’s settled status or British citizenship, where the route depends on it;
  • the details of two referees, each of whom has known the child for at least 3 years; and
  • a consent letter from the child’s parents or legal guardians.

A child born abroad to a British parent also needs the British parent’s birth certificate or passport. The British grandparent’s citizenship evidence and the grandparents’ marriage certificate are needed too. Evidence of the residence period is needed for section 3(2) and section 3(5).

Whytecroft Ford can check the documents for the chosen section before the MN1 form is filled out. Call 0208 757 5751 or use the contact form.

Child’s personal details, nationality and passport

The opening section collects the child’s identity, settlement status and contact details. Later, the documents list asks for the child’s passport or another officially issued identity document.

The form asks:

  • the child’s title, given names and family name, and whether they have been known by any other name;
  • whether the child has had settlement in the UK, the type of settlement and the date it was granted;
  • whether either parent named in the application is applying for naturalisation on Form AN;
  • the child’s postal address, whether the child lives there and when they started living there;
  • whether the child has lived at the current address for 5 years;
  • the child’s sex as shown in the passport, travel document or birth certificate, and relationship status;
  • the child’s country of nationality, country of birth, place of birth and date of birth;
  • passport details, and whether the child has a biometric residence permit or national identity card;
  • whether the child holds or has held any other nationality; and
  • the child’s National Insurance number and a contact telephone number.

A parent applying on Form AN alongside the child makes a joint application for British citizenship. The two applications are linked. The guidance states that this parent should confirm that the child is still to be registered if the parent’s own application is refused. Where that confirmation is not given, the child’s application is treated as withdrawn when the parent’s is refused, and no refund is given.

A further question records whether the applicant has an immigration adviser. According to the guidance, nationality advisers acting in the course of business are regulated by the Immigration Advice Authority.

Whytecroft Ford’s immigration team can complete the personal details section with the applicant and check each answer against the child’s documents.

The parent section records each parent’s nationality and settled status, which the section 1(3) entitlement depends on. Under section 1(3), a child born in the UK is entitled to register when a parent becomes settled here or becomes a British citizen.

For each parent or legal guardian, the form asks:

  • their title, given names, family name and date of birth;
  • their town and country of birth;
  • whether they share the child’s address, telephone number and email;
  • their country of nationality, whether they have always had the same nationality, and their nationality when the child was born;
  • whether they are settled in the UK; and
  • the date they became settled in the UK.

The Home Office compares the parent’s settlement date with the child’s date of birth. Where a parent was settled before the birth, the child may already be British and does not need to register. Where a parent settled after the birth, the child has the section 1(3) entitlement.

A separate question asks whether settled status is evidenced by a parent’s permanent residence as an EEA national or as the family member of one. The guidance sets out how the rules for children of EEA nationals depend on the date of birth and the parent’s status at that time.

Whytecroft Ford’s team can check a parent’s settlement date against the child’s birth before the parent section is completed.

Parents’ marriage and the biological mother’s marital information

The marriage questions identify which route applies where the parents were not married. Section 4F lets a child register where they would meet section 1(3), 3(2), 3(5) or 4D if their parents had been married. A child born to a British citizen father on or after 1 July 2006 may be British even if the parents were not married. Paternity must be proved, and this does not apply where the mother was married to someone else at the time of the birth.

The form asks:

  • whether the child’s parents or legal guardians are married or in a civil partnership;
  • the date of the marriage or civil partnership;
  • whether the child’s biological mother was married at the time of the birth; and
  • the name of the biological mother’s partner at the time of the birth.

These answers also identify a child who should use Form UKF instead. A child who would have become British automatically had their parents been married applies under section 4G, not on the MN1 form. For births registered before 10 September 2015, paternity is proved by a birth certificate naming the father issued within one year of the birth. Other evidence, such as DNA test reports or court orders, can also prove it.

Whytecroft Ford can advise on whether the marriage questions point to section 4F or to Form UKF for a particular family.

Residency details and the residence routes

The residency questions record where the child lives and where they will live if registered. The form asks whether the child lives in the United Kingdom or a British overseas territory. It also asks which country the child will live in if the application succeeds. Residence is a legal requirement when registering a child born outside the UK as a British citizen under sections 3(2) and 3(5).

The Form MN1 guidance states that a child qualifies for registration under section 3(5) of the British Nationality Act 1981 where:

  • the child and their mother and father have lived in the UK for the 3 years ending with the date the application is received;
  • the child and their parents were physically present in the UK at the start of that period;
  • none of them has been absent for more than 270 days during the 3 years; and
  • both parents consent to the registration.

The guidance states there is no discretion to disregard absences of more than 270 days. Where the parents’ marriage or civil partnership has ended or they have separated legally, only the child and one parent must meet the residence requirement. Where one parent has died, only the surviving parent’s consent is needed.

Section 3(2) looks back instead. The British-by-descent parent must have lived in the UK for a continuous period of 3 years at any time before the child’s birth. Absences of no more than 270 days are allowed. The child’s grandparent must also have become a British citizen otherwise than by descent. That must have happened on 1 January 1983 or at the time of the parent’s birth.

Whytecroft Ford’s immigration team can work through the residence dates and absences with the family before the section is completed.

School, other history and the good character requirement

The school and history questions feed the good character requirement, which applies to a child aged 10 or over. Under the guidance, the child must observe UK laws and show respect for the rights and freedoms of UK citizens. Every child aged 10 or over is checked by the Home Office.

The form asks:

  • whether the child is working or a student, and the name and address of their school, college or university;
  • whether the child has ever been involved in, or suspected of, war crimes, crimes against humanity or genocide;
  • whether the child has been involved in, supported or encouraged terrorist activities, or supported an organisation concerned in terrorism;
  • whether the child has expressed views that justify or glorify terrorist violence; and
  • whether the child has engaged in any other activities which might indicate they may not be of good character.

The Home Office also considers the child’s immigration history. Under the guidance, an application will normally be refused where the person entered the UK illegally, however long ago. Immigration breaches will normally be overlooked where they were outside the child’s control, taking account of the child’s age at the time. Mitigating factors can be explained in the special circumstances box at the end of the form.

Whytecroft Ford’s immigration team can advise on the good character requirement where a child aged 10 or over has anything to disclose.

Convictions and other penalties on the MN1 form

The convictions section records every penalty given to the child, in the UK or abroad. The guidance requires details of all criminal convictions, out-of-court disposals, civil orders, civil penalties and civil judgments. Criminal record checks are carried out in all cases.

The form asks whether the child has ever had:

  • a criminal conviction;
  • a penalty for a driving offence;
  • an arrest or charge for which they are on, or awaiting, trial;
  • a caution, warning, reprimand or other out-of-court penalty;
  • a civil court judgment, such as for non-payment of debt, bankruptcy proceedings or anti-social behaviour; or
  • a civil penalty under UK immigration law.

A further question asks whether the child is on the sex offenders register. It also asks whether the child is subject to a notification order, sexual offences prevention order, foreign travel order or risk of sexual harm order. Fixed penalty notices must also be disclosed. The Home Office will not normally count fixed penalty notices against the child. The exceptions are notices that went unpaid and led to criminal proceedings, or several received in a short period.

Where the child has been charged and is awaiting trial or sentencing, the guidance advises against applying until the outcome is known. An arrest or charge after the application is made must be reported while it is under consideration. Failing to do so risks prosecution under section 46 of the British Nationality Act 1981.

Whytecroft Ford can review the child’s full history, including any fixed penalty notices, before the convictions section is answered.

Referee details for a child’s MN1 application

The referee section records two referees for each child. The guidance requires the application to be endorsed by 2 referees, each of whom has known the child for at least 3 years.

For each referee, the form asks:

  • their title, given names, family name and sex;
  • their address, and whether they have lived there for more than 3 years;
  • every other address they have lived at in the past 3 years, where they have moved;
  • how they know the child;
  • their date of birth, daytime telephone number and email address; and
  • whether they are a British citizen, and their current British citizen passport number.

One referee can be of any nationality but must be a professional person, drawn from the professions accepted for referees in British citizenship applications. The other must hold a British citizen passport and be either a professional person or over 25. For a child, at least one referee must have dealt with them in a professional role. Examples are a teacher, doctor, health visitor or social worker. A referee must not be related to the child or the other referee. Nor may a referee be the adviser on the application or work for the Home Office.

A referee convicted of an imprisonable offence in the last 10 years will not usually be accepted.

Whytecroft Ford can check that both referees meet the guidance before their declarations are requested.

Local authority care, the fee waiver and the MN1 application fee

The final questions ask whether the child lives in local authority care in the UK and whether a fee waiver has been applied for. According to the Home Office immigration and nationality fees table, the fee to register a child is £1,000.

The form asks:

  • whether the child is living in local authority care in the UK;
  • whether a fee waiver has been applied for; and
  • whether there are any other details to be considered about the child and their application.

A child looked after by a local authority does not apply for a fee waiver. GOV.UK states that evidence of the care arrangement is provided with the citizenship application instead, and the application is free. Any other child can request a citizenship fee waiver where the child and their parent or guardian cannot afford the fee.

A fee waiver applied for online must be decided before the citizenship application is made. Where it is granted, the Home Office issues a code, called a token, which is entered in the MN1 application. Other Home Office charges are listed in UK visa application fees.

Whytecroft Ford can confirm whether a fee waiver or the local authority route applies to the child.

The documents list is generated at the end of the form from the answers given. It names each document to upload for each child, and the consent section confirms the referee declarations and the parents’ consent will be provided.

The documents list can include:

  • proof of each parent’s parental responsibility for the child;
  • colour copies of every page of the child’s passport, including blank pages, in page order;
  • evidence of a parent’s settled status, such as a biometric residence permit, a Home Office letter or a passport endorsement;
  • evidence of a parent’s British citizenship, such as a British passport or certificate of citizenship;
  • the child’s birth certificate showing both parents, and the parents’ marriage certificate;
  • two referee declarations for each child; and
  • a letter of consent from the child’s parents or legal guardians.

The form sets out what the consent letter must contain. It must give the parents’ or guardians’ full names and addresses, and say that they agree to the application for British citizenship. Where there are two parents or guardians, both must sign. Where only one signs, the letter must explain why the other parent cannot consent, for example that their whereabouts are unknown.

The declaration confirms the information and supporting evidence are correct to the best of the applicant’s knowledge and belief. It warns that giving false information can lead to refusal and to prosecution. A representative submitting the form confirms they have checked the contents with the applicant.

The documents list depends on the section chosen. Whytecroft Ford can prepare the consent letter and check every document before upload.

Applying for more than one child on the MN1 form

Brothers and sisters can be registered in the same online application, with each child added as a separate applicant. The online form records each child’s application under its own reference and asks the full set of questions for each child.

For each additional child, the form asks:

  • whether the first child’s immigration adviser represents this child too;
  • whether communications for this child can be sent to the email address already given;
  • whether the telephone number and postal address already given can be used for this child; and
  • every personal, parent, residence, character, referee and convictions question again, for this child.

Each child needs their own category, their own documents and their own two referee declarations. The same referee can endorse more than one child where they meet the criteria for each.

Whytecroft Ford’s immigration team can prepare a single application for several children and keep each child’s section and documents separate.

What happens after the MN1 form is submitted

After the form is submitted and paid, each child enrols their biometric details. The guidance states that a child under 5 does not need to provide fingerprints but must have a digital photograph taken of their face. A child under 16 must be accompanied by a parent or legal guardian. An application may be rejected as invalid if biometrics are not enrolled when requested.

The Home Office aims to decide citizenship applications within 6 months of receiving them. Some take longer, as set out under British citizenship processing time. A British citizenship priority service is available, and the guidance states a decision is usually made within 30 working days on that service.

A child who is still under 18 when the application is approved becomes a British citizen on the date of approval. That child does not need to attend a citizenship ceremony but will be invited to a family celebration. A child who has turned 18 by the time of the decision must attend a ceremony and take the oath and pledge. That child becomes British at that point, and the Home Office requests an additional £130 ceremony fee per applicant at the point of decision.

Whytecroft Ford’s immigration team can prepare and submit the full MN1 application. Call 0208 757 5751 or use the contact form.

Timeline in practice for a child’s MN1 application

The Home Office tests age on the date it receives the application, but the ceremony requirement depends on age at the date of decision. Two anonymous scenarios show the difference.

A child aged 17 years and 10 months applies on the standard service. The Home Office aims to decide within 6 months, which would fall after the child’s 18th birthday. A decision made after that date means the child attends a citizenship ceremony and the additional ceremony fee is requested. On the priority service, the guidance states a decision is usually made within 30 working days. That period may fall before the 18th birthday, although additional checks can extend it.

A child aged 12 applies on the standard service. Good character applies from age 10, so the character questions and the convictions list are completed for this child. If the decision is made within the 6-month aim, the child becomes British on the date of approval. That child attends no ceremony and is invited to a family celebration.

Whytecroft Ford’s immigration team can advise on the timing of an application where a child is close to turning 18.

Frequently asked questions

Can I apply for the MN1 form online?

Yes. Most MN1 applications are made online, and a paper version of the form is also published on GOV.UK. If a fee waiver was granted online, the citizenship application must also be made online.

Does my child need to pass the Life in the UK Test or an English test?

No. The MN1 guidance lists no Life in the UK or English language requirement for a child. The requirement that does apply is good character, for a child aged 10 or over.

What happens to the MN1 application if my own citizenship application is refused?

You can confirm on the form that your child should still be registered if your application is refused. If you do not, the guidance states that your child’s application is treated as withdrawn when yours is refused, and no refund is given.

What if one parent does not consent to the registration?

The consent letter must explain why the other parent cannot consent. For a child living in the UK, the guidance also asks for a letter of reasons where one parent does not agree.

Will my child lose their other nationality?

That depends on the other country’s law. The MN1 guidance warns that some countries remove nationality when a person becomes a citizen of another country. It advises checking with that country before applying.

How Whytecroft Ford can help

The MN1 form asks the same detailed questions for every child. Each answer depends on choosing the correct section of the British Nationality Act 1981. A child’s application made under the wrong section, or without the evidence that section requires, may be refused. Whytecroft Ford’s immigration team prepares child registration applications regularly.

Our team is experienced, approachable and professional. To discuss your child’s application, call 0208 757 5751 or use the contact form.

Sources

Disclaimer: The material in this article is provided for guidance and general information only and is not intended to constitute legal or other professional advice upon which you should rely. In particular, the information should not be used as a substitute for a full and proper consultation with a suitably qualified professional. UK Immigration Rules are subject to change. Please do contact the Whytecroft Ford team if you require further advice.

Have a question? Get in touch for a no-obligation expert opinion.

Related Insights