YSK that if you live in one of the 38 American states that are 'one party consent' states, you can legally record your conversation without anyone else knowing

Gotta find some links for info for ya too. Just saved my ass $6,000 in rent over a broken lease

Wikipedia article on Telephone conversation recordings

Cornell Law website '18 U.S. Code § 2511 - Interception and disclosure of wire, oral, or electronic communications prohibited'

Ianal but you should at least know someone could be recording your conversation without your knowledge