What is one investigative technique that should not be used when confirming fraud?

The technique of using the same age as a criterion for confirming fraud is not effective because it does not provide relevant information related to the specifics of the fraudulent activity being investigated. Confirming fraud requires an examination of facts, behaviors, and circumstances surrounding the case.

In contrast, background checks, interviews with involved parties, and document verification are all essential investigative methods. Background checks can reveal past behaviors or criminal activity that may relate to current allegations of fraud. Conducting interviews allows for the gathering of firsthand accounts and potentially clarifying discrepancies in information. Document verification is critical as it involves examining records that may provide concrete evidence of fraudulent activity. Therefore, establishing the same age does not contribute meaningful insights to a fraud investigation, making it an ineffective method.