How you receive an MN1 decision: email, post, and certificate timing
An MN1 (registration of a child as a British citizen) decision is normally confirmed in writing first, commonly an approval email, sometimes a decision letter, and the registration certificate is a separate physical document that follows by post afterwards. For children under 18 there is no ceremony to attend, so the certificate can simply be sent out or collected by a parent. GOV.UK does not publish a guaranteed posting time, but in practice the certificate typically arrives within a few weeks of the approval.
- Application: MN1, child registration as a British citizen
- Decision confirmed: in writing (often by email), then a separate posted certificate
- Official decision aim: within 6 months of the date the application is received
- Ceremony for under-18s: not required
- Certificate posting time: not published by GOV.UK, realistically a few weeks after approval
Email or post? How the outcome reaches you
The outcome of an MN1 application effectively arrives in two stages. First comes the decision itself, confirmed in writing. Many families receive this as an approval email, and a decision or approval letter may follow. Then comes the certificate of registration as a British citizen. The document that actually proves citizenship, which is a physical item sent by post.
So the honest answer to "email only or both?" is that the decision is normally communicated in writing and often by email, while the certificate is a separate posted document. Receiving the approval email does not mean the certificate is in the same envelope. It is produced and dispatched afterwards.
GOV.UK's MN1 guidance confirms that for children the certificate does not depend on attending a ceremony, but it does not spell out an exact delivery channel or date for the certificate. If your email says the application has been granted, treat that as confirmation and expect the certificate to follow.
Why one sibling was approved before the other
Each child's MN1 is assessed as its own individual application, even when siblings apply together on the same day and give biometrics at the same appointment. The Home Office decides them separately, so it is completely normal for one child to be granted while a sibling's case is still being worked on.
A short gap between approvals usually reflects nothing more than the order in which caseworkers pick up files. It does not signal a problem with the second child's application. If both were submitted together, the second decision commonly follows within days or a few weeks. You can read more about staggered approvals for people who applied together in our guide on why approval emails arrive separately for each applicant.
Do not book travel, apply for a passport, or assume citizenship for the second child until you have their own written decision. One child's approval says nothing certain about another's, even on an identical family application. Wait for each individual outcome.
How long the certificate takes to arrive
This is the part with no official number. GOV.UK sets a decision-making aim. The Home Office "aims to conclude citizenship applications within 6 months" of receiving them, but it does not publish a service standard for how quickly the physical certificate is posted after approval.
Based on the process wording, the realistic expectation is that the certificate is dispatched shortly after the grant and arrives within roughly two to three weeks, though this can vary and is not guaranteed. Because that figure is not an official commitment, do not panic if it takes a little longer, postal handling and printing volumes both play a part.
6 months. The Home Office's stated aim for concluding a citizenship application, from the date it is received.
If the certificate has not arrived a good while after your approval email, you can contact UKVI to ask about its status. For a fuller view of end-to-end timings, see how long MN1 child registration takes.
What happens after the certificate arrives
For a child under 18, there is no citizenship ceremony requirement. The child becomes British when the application is granted, not at a ceremony. GOV.UK notes that under-18s do not need to attend, though they may be invited to a family celebration if a parent is naturalising at the same time. A parent can collect the certificate on the child's behalf where a collection applies.
That differs from applicants aged 18 or over, who must attend a ceremony and take the oath and pledge within three months of their invitation before they legally become citizens.
Once you have the registration certificate, the natural next step is to apply for the child's first British passport. Keep the certificate safe. It is the core proof of citizenship and you will need it for the passport application and in future.
If your family is also preparing for the Life in the UK test on the adult side of a citizenship journey, BritPass practice questions can help you get ready with confidence.