All UK registered companies are legally required to have a UK registered office address. It is the address of a company to which Companies House, HMRC and other official notices, letters and reminders will be sent. The registered office address can be anywhere in England and Wales (or Scotland if your company is registered there). The registered office address must always be an effective address for delivering documents to the company, and to avoid delays it is important all correspondence sent to this address is dealt with promptly. The registered office address cannot be a PO Box, it must be an address where legal papers can be served.