https://en.wikipedia.org/wiki/Telephone_call_recording_laws#One-party_consent_states https://en.wikipedia.org/wiki/Telephone_call_recording_laws#... Although a

https://en.wikipedia.org/wiki/Telephone_call_recording_laws#One-party_consent_states https://en.wikipedia.org/wiki/Telephone_call_recording_laws#... Although a wrinkle is a single user in a two-party jurisdiction overrides and all parties would need to be notified, and if you don't know for sure where each end user is, then you're taking a gamble on the legality.