Federal law permits recording telephone calls and in-person conversations with the consent of at least one of the parties.

See 18 U.S.C. 2511(2)(d).

 

This is called a "one-party consent" law. Under a one-party consent law, you can record a phonecall or conversation so long as you are a party to the conversation.

Recording Phone Calls and Conversations | Digital Media Law Project

www.dmlp.org/legal-guide/recording-phone-calls-and-conversations