The main condition based on which a person can prove a fraud is that it must have caused the person to suffer some kind of a monetary loss and not just on the basis of lying. For example: if a salesman lies to you about his name and date of birth, you cannot charge him for fraud, however, if he lies about the product which later he sells to you which causes actually monetary loss or damage to you, you can charge him for fraud.
Laws pertaining to fraud differ from state to state and country to country. It is very important that you prove the deliberate lying or misrepresentation of facts, in court. Another thing that you need to prove in the court is the actual trust on the expertise of the person that you are accusing. How the man first won your trust and later lied to win you into investing money or buying a product. A case of fraud has an obligation of investigation and should be fought with the help of legal entities.
Laws pertaining to fraud differ from state to state and country to country. It is very important that you prove the deliberate lying or misrepresentation of facts, in court. Another thing that you need to prove in the court is the actual trust on the expertise of the person that you are accusing. How the man first won your trust and later lied to win you into investing money or buying a product. A case of fraud has an obligation of investigation and should be fought with the help of legal entities.