Your CRN is your company's unique identifier at Companies House. We explain where to find it, what it looks like, and when you must quote it.
Company Guides9 April 2026·5 min read
This guide hasn't been migrated to the new site yet. It's still available on our main site in the meantime.
Check your name against the live Companies House register and file the same day.
Check a nameEven below the VAT threshold, voluntary registration can offer advantages — particularly if you deal with VAT-registered businesses. We help you decide.
5 min read
Protect yourself from fraud. This guide covers how to verify a UK company via Companies House and spot warning signs of illegitimate businesses.
12 min read
Covering voluntary strike-off, Members' Voluntary Liquidation, and creditors' processes — your options when winding up a UK limited company.
7 min read