In California, and the states on your list like it, a confidential conversation is recorded only with the consent of everyone in it; a notice at the very start, before recording begins, is how a business gets it. Each session is decided one of two ways: kept, with the proof, or destroyed. Overture never holds the recording - only its reference, the customer's account number and times.
For each kept recording, the proof a court would ask for: the notice word for word, the version, when it was given, what the customer did, and when recording began.
A notice is never edited once a session has used it - the proof has to show the words the customer actually got. To change one, retire it and add the new version.