English to French Bus/Financial

that is difficult in a sense because the letter written by the member of staff was an enquiry because this had come to their attention. It was a perfectly vali enquiry because it has just been attached. I may have thought it is not possible or I may have thought 'Has he acquired some shares in the UK ?' It was a genuine inquiry, but investigatons showed that they actually related to another client

(contexte : interrogatoire suite à une erreur d'un cabinet d'expertise qui a mélangé par inadvertance des documents concernant deux clients différents).