An in-depth examination of records and enquiry into the situation of the business or for a particular cause is termed as investigation in an audit. A fraud investigation audit is conducted to find out the fraudulent activity (if any) and the exact depth of committed fraud along with the areas affected by it. The investigator also identifies the loopholes or gaps that acted as a gateway for the perpetrator to commit the fraud. It is necessary to figure out the weaknesses in the system that tempt the wrongdoers to get involved in negative activities and fix them right away to suppress such instances from reoccurring in the future.