Documents issued by your company must show the company's full and correct name, its registered number, a statement as to where it is registered (eg Registered in England and Wales) and its registered office address. If no other address is shown then you do not need to put "registerd office" before the address, but if the company has a different trading or correspondence address form its registered office then the registered office address must also be shown, usually prefixed by the words "registered office".