The Appoint a Director form (typically Form AP01 for Companies House in the UK) must be signed by an authorized person within the company. This can be an existing company director, the company secretary (if appointed), or an authorized agent such as an accountant or solicitor acting on behalf of the company. The signatory is confirming that the new director has agreed to take on the r... https://xactaccountants.co.uk/appoint-a-director/