Some wire tap laws allow a conversation to be recorded as long as one person in the conversation knows it is being recorded.
Depends on the state. Some states require all parties be aware.
Right.
That's a federal regulation, states have their own versions which must at least meet the federal version. Florida requires both parties know that it is being recorded unless there is no assumption of privacy; say you are talking to someone in their cubicle with no ceiling, there is no assumption of privacy so recording the conversation wouldn't be illegal in Florida if only one person knew it was being recorded. It's best to check your state law. Federal law is a minimum standard.
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