Authorised corporate service provider (ACSP) registration has been open since 18 March 2025, and Companies House (CH) estimates that up to 55,000 businesses will register within the one-year mark of the launch.

It is necessary for firms to be an ACSP, also known as a Companies House authorised agent, in order to provide identity (ID) verification services for Companies House purposes to clients. By spring 2026 it is also expected that firms will have to be an ACSP in order to file with Companies House on behalf of clients.