> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.hoxtonmix.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Where is my Company Authentication Code!

> ⚡ **Quick Answer:** Your Company Authentication Code is sent by post from Companies House to your **registered office address**. If your registered office is with Hoxton Mix, the letter will be scanned and available under the **Mail** tab in your [customer portal](https://www.account.hoxtonmix.com/) when it arrives. Allow **5-10 working days** from the request.

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# How to Request a New Code

1. Go to [Companies House WebFiling](https://ewf.companieshouse.gov.uk/seclogin) and sign in (or register if you haven't)
2. Select **"Forgotten your authentication code?"**
3. Choose whether the code is for a company or LLP
4. Enter your company number and click **Submit**
5. Confirm your details

The code will be posted to your registered office address.

> 💡 **Tip:** You can also [request the code be sent to a director's home address](https://find-and-update.company-information.service.gov.uk/auth-code-requests/start) if the officer's address is on file at Companies House.

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# If Your Registered Office Is With Hoxton Mix

The authentication code letter will be:
- **Received** at 66 Paul Street, London EC2A 4NA
- **Scanned** on the day it arrives
- Available under the **Mail** tab in your customer portal, with a notification

If the letter hasn't appeared in your portal yet, it usually means it hasn't arrived from Companies House. Allow 5-10 working days.

> ⚠️ **Important:** If your subscription is inactive, mail will be **returned to sender**. Make sure your account is active before requesting the code. If mail was returned, contact Companies House to request a new code.

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# What You'll Need

- Your **company number**
- A **Companies House WebFiling account** (this is different from a standard Companies House account)

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# Why Is It Sent by Post?

Companies House sends authentication codes by post only — not by email. This is a security measure to prevent unauthorised access to company filings.

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# Common Questions

**How long does it take to arrive?**
Usually **5-10 working days** from the date you request it.

**I can't see it in my portal — what should I do?**
If it hasn't appeared, it likely hasn't arrived yet. Check back in a few days. If it's been more than 10 working days, request a new code from Companies House.

**Can I get the code by email instead?**
No. Companies House only issues authentication codes by post for security reasons.

**Can it be sent to my home address instead?**
Yes — use the [alternative request form](https://find-and-update.company-information.service.gov.uk/auth-code-requests/start) if you want it sent to a director's residential address on file.

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**[Log in to your portal →](https://www.account.hoxtonmix.com/)**