Please note that each case is the subject of a quote or a detailed fee agreement.

He must define a legal investigation strategy, proportional to the objectives sought.

After accepting the mission, you will sign a mission contract specifying the general conditions of service provision.

At this moment the private detective becomes the sole person responsible for his mission. He must present proof of his status as a private detective. And if possible it must inspire your confidence.
The client is free to entrust him with the mission or not. The private detective has the right to submit his report at the end of his mission, as well as the fees charged.
The customer has the right to pay him as soon as the work is done to his satisfaction.
No one other than the private detective and his client can be responsible in a matter of contract signed by both people.