The act of audio surveillance is an area of the surveillance industry that requires delicate handling. There are many Federal and local laws that dictate what is, and is not, legal. Audio surveillance is some of the most powerful evidence available to Investigators. It is an undeniable proof of statement that can be a powerful ally. It is strongly suggested that before you make any attempt to record a conversation with a Phone Recorder or with any other device, you speak with a Lawyer as well as consulting all applicable local and Federal laws.