A COMPLETE GUIDE TO COMPANY AUTHENTICATION CODES Company Authentication Code is like a password or a unique identifier. It is issued to all limited companies in the UK. Obviously, it’s confidential information.
After a limited company is formed with Companies House in the UK, the Companies House then issues the newly formed company a Company Authentication Code. Hence, every limited corporation has got this number, irrespective of whether it is dormant or trading. A Company Authentication Code usually contains six characters and is alphanumeric. A Company Authentication Code is mandatory in case of a change of company ownership or a change of company directors. These changes are usually done by online filing at Companies House. The Company Authentication Code is used as a replacement for the physical signature of a director. Therefore, we can say that a Company Authentication Code is equivalent to a director’s signature. In other words, it is an electronic signature of a company’s director. So it is indeed a pretty important and confidential piece of company data. It is therefore advised to keep your Company Authentication Code very secure and private. It should only be accessed by people who are authorized to change your company details.