What document must a private investigator present when working for a client?

A private investigator is required to present a letter of authorization from the client when working for them. This document serves as formal evidence that the investigator has the client's permission to conduct specific investigative work. The letter of authorization not only protects the rights of the client but also ensures that the private investigator operates within the legal framework by confirming that the actions taken are authorized and legitimate.

In the realm of private investigation, having this written authorization is essential for establishing trust and clarity between the investigator and the client, as well as protecting the investigator from potential legal repercussions in the course of their duties. It provides a clear outline of the scope of work being authorized and protects the confidentiality of information shared during the investigation.

Other documents, such as a resume, business card, or non-disclosure agreement, may have their own importance in professional settings or client relationships, but they do not carry the same level of legal authority and specific authorization for the actions undertaken by the investigator as a letter of authorization does.