Writing detailed summary reports is an important part of the investigative ­process. The case initiation report ordinarily details the who, what, when, and where and sometimes the why, how, and how much. If investigative tools, sources, or resources were used during the investigation, they should be documented in a report. Sometimes formal and informal requests are written for others to provide assistance in the investigation. Reports should document when, how, and to whom the requests were made and what the requests were for. At the conclusion of the investigation, a detailed investigative summary report should be written. Professional opinions often differ on what information should be included in investigative reports. The contract file should contain documentation from the inception until completion of the order. During your investigation, you may obtain or recover electronic communications of evidentiary value. Original and copies of billings, invoices, and records of payment are often secured as evidence, especially in false claims cases.