This Precedent Internal investigation interview invitation letter has been written in partnership with Caroline Black and Noel Power of Dechert LLP. It can be used to invite a member of staff to attend an interview. It provides detailed warnings in relation to confidentiality and privilege and makes it clear on whose behalf any attending or interviewing lawyer is acting, sometimes known as an Upjohn Warning, from the US case of Upjohn Co. v United States.. There is a separate Precedent for an interview warning