Wiretap laws vary state-by-state, but most require at least one party to consent to a wiretap. Some require both parties to consent, which means turning on call

Wiretap laws vary state-by-state, but most require at least one party to consent to a wiretap. Some require both parties to consent, which means turning on call recording is a felony in some states, unless both parties are aware. (Which is probably why every call center starts with "This call may be recorded...").