What is WebFiling Authentication Code?
A WebFiling Authentication Code is a 6 digit alphanumeric number or code which is allocated to the companies once they are registered with the Companies House.
It is issued by the Companies House and enables you to do all kind of online updates to your company like if you are appointing a new director, you can update about the same online using the WebFiling Authentication Code.
Apart from updating the information online, you will be able to do the following with the WebFiling Authentication Code:
In case you have formed your company directly with the Companies House, your WebFiling Authentication Code will be sent to you directly at the registered address of your office.
However, this is not an automatic or obvious process and you need to request for your authentication code once your company is incorporated with the same. You can do so by following the below listed process:

After you have completed above mentioned steps, your authentication code will be mailed to your company’s registered address.
Once you have the WebFiling authentication code with you, you need to handle it with care and not share it with anyone and everyone because authentication code of your company is equivalent of a Director’s signature and thus it should be shared with utmost care.
Companies House will post the authentication code at your registered office address. However in case you have changed your address, you need to update the same with the Companies House well in advance, ideally before your authentication code is dispatched.
Because in case of a wrong address, the mail sent by the Companies House will be returned to them and if it happens 2/3 times, your authentication code will be changed.
It is best to explain the situation to the Companies House well before they take any action and you can do the same by sending your email on enquiries@companieshouse.gov.uk.
How to Change the Web Authentication Code?
In case you wish to change the web authentication code sent by the Companies House, you can do so by following below mentioned steps:
- In case you are already registered, you can directly log in on the Companies House website else you have to register for the Companies House WebFiling.
- Enter your company number and the existing authentication code.
- Select ‘Company Authentication’.
- Re-enter the new code as per your wish. However, you need to ensure that the new code is of 6 digits and is alpha-numeric in nature.
- Select ‘Change Code’.

Above mentioned steps can be used when you wish to change your authentication code by yourself, however, it can also be changed without your permission under below mentioned circumstances:
And in the above case, you need to request the Companies House to resend your authentication code to you. The steps to do so are as below:
However, in case you have formed your company online via a company formation agent, it becomes easy for you to retrieve your lost authentication code and you need not request to the Companies House to resend the same to you.
In case of a company formation agent, you need to login into your customer section on their website and there you can see all the details of your company along with your company’s authentication code.
You can reach out to your formation agent directly and request for your authentication code. However, in case your WebFiling authentication code is expired or have been changed directly by the Companies House, you need to login or register yourself on the WebFiling Section of the Companies House website and request for a replacement code as mentioned above.
Looking After Your Authentication Code
Once you have your authentication code with you, you must take care of the same because the code is equivalent of a Director’s signature.
Anyone who gets the access to your code can change any detail of your company online in the registers of the Companies House. Apart from keeping it safe, you must choose your authentication code with care so that it cannot be easily guessed.
You can look after your authentication code in following manners:
Companies House never make a telephonic enquiry on the same and in case you get a call like this, it is advisable to report the Companies House.
Related Aricle:
How to Pay Companies House Late Filing Penalties? | DNS Accountants
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