What it is, why Companies House introduced it, and why directors/PSCs might choose an ACSP to verify identity.

Your Companies House authentication code is one of the most important security tools for your business. Without it, you can’t file accounts, update company information, or make changes to directors. In this guide, we’ll explain what the authentication code is, why it matters, how to get it, and what to do if you’ve lost or need to change it.

Everything you need to know about filing year end accounts to Companies House & HMRC.