Thats my understanding too.
As a company, we do note on the on hold that some calls may be recorded, but thats a nicety, not a requirement. All calls to the call centre are recorded, and the agents are fully aware (they signed a document). Some calls are reviewed for training purposes. But in the rarish occasion that a customer abuses an agent, we have used that recording as well. The use of that goes through HR though.
James