CH23640 | Information & Inspection Powers: Information Notices: Third party notice: Copy of the notice to the named person
From HM Revenue & Customs · Compliance Handbook
When you issue a third party notice you must, at the same time, give the named person a copy of it but there are exceptions to this.
See CH23660 if you think that giving a copy of the notice to the named person might prejudice the assessment or collection of tax.
See CH23700 if you want to give a third party notice to a partner for the purpose of checking the tax position of one or more other partners (in their capacity as such).
See CH23740 if you want to give a third party notice in respect of an undertaking that is part of a group of undertakings.
See CH23990 if you want to give a third party notice to any person and the notice refers only to information or documents that relate to any pensions matter.
FA08/SCH36/PARA4
FA08/SCH36/PARA34B
FA08/SCH36/PARA35
FA08/SCH36/PARA37