Some people record their calls. Businesses often have to per compliance in most direct to consumer sales situations. From the recording, if not algorithmically, a court of law could easily determine an AI voice case by case.
A real call center would have a record of which employee made which calls when. The court subpoenas those records and the phone company's records. If they don't match, there are problems. Unless the company wants to commit perjury by inventing fake employees and call records.
