CECCG13500 | Complaints Handling Procedure: Information and documentation required by Internal Investigations
From HM Revenue & Customs · Complaints from External Customers about the Conduct of HMRC staff Guidance
The referral to Internal Investigations should be made using the external oversight referral form which can be accessed on the Internal Investigations SharePoint page (quick links) via the following link: Internal Investigations
The referral form outlines the information required by Internal Investigations which includes:
the letter of complaint
a note of the complaint if made orally
any other relevant supporting documentation that accompanies the complaint such as the complaints submission stencil
any evidence, call recordings etc. to potentially substantiate the allegation of wrong doing
contact details for the complainant such as a telephone number or e-mail address