Companies House Authentication Code

This code allows us to submit forms to Companies House on your behalf.

We will need your Companies House Authentication code to submit accounts to Companies House.

We also need it to keep your company information up to date, such as your Persons of Significant Control (PSCs), shareholder and director registers.

Your Companies House Authentication Code is confidential. Sharing it confers the ability to amend your register of shareholders amongst other things.

Find Your Companies House Letter

When you form your limited company you will receive a letter containing your authentication code. It usually arrives within the first two weeks of incorporation.

How Do I Request A Missing Companies House Authentication Code?

Get it sent to your registered office address

1. Login to the Companies House Webfiling service or register an account
2. Select Request an authentication code

3. Enter your company registration number, which you can lookup here
4. Select Request code

Companies House will post the code to your registered office address in around 5 days. You can lookup your registered office address at Companies House.

Ask Numble to request a code

We can request your authentication code without you having to set up an online account. Feel free to ask!

Change the address and then request a code

If you've lost your code and do not have access to your registered office address you'll need to send an AD01 paper form to change your address. It must be signed by a director.

Then you can follow the steps above.

Check elsewhere

If you used a formation agent like Companies Made Simple to create your company, then you may be able to find your Companies House Authentication Code in your online account. This might be easier than waiting for a code in the post or sending a paper form.