In the United States, under the Foreign Intelligence Surveillance Act, federal intelligence agencies can get approval for wiretaps from the United States Foreign Intelligence Surveillance Court, a court with secret proceedings, or in certain circumstances from the Attorney General without a court order [REF].
Under the law of the United States and most state laws, there is nothing illegal about one of the parties to a telephone call recording the conversation, or giving permission for calls to be recorded, or permitting their telephone line to be tapped.