The decision of whether or not to file a suspicious transaction report (also known as a suspicious activity report or SAR in the United States) often involves weighing the aggravating and mitigating factors arising from the research conducted during the investigative process. The final decision should be documented and supported by the reasoning that was used to make the determination. The transaction has already been investigated which led to the requesting of the document. The document checked out and the question did not specify the document was suspicious, therefore we can conclude an STR does not need to be completed and thus should move to document the reason why an STR wasn't completed.