Click ‘Request an authentication code’ at the bottom of the next page
Select your company’s country or registration
Enter your company registration number and click ‘Continue’
Review your company information and click ‘Request Code’
Companies House will post your authentication code to your registered office address. When you receive it, you can sign into WebFiling by providing your password and authentication code.
If you have already registered for WebFiling but you have simply forgotten your authentication code, you can request a reminder to be posted to your registered office address. To do so, click here, enter your email address and password and request an authentication code.