There are a couple of things I can drop info on here.
Regarding recordings in general: This varies from state to state. Some states are one-party states (only one of the participants in a conversation has to know they are being recorded). Some states are two-party states (both parties must know) - this is why when you call tech support, you get that message about 'this call may be recorded for quality monitoring or training purposes'. Federal wiretapping is another matter entirely.
Regarding confidentiality: Priests, therapists, and doctors are ethically bound not to reveal things that are told to them. This is because that confidentiality is crucial to the effectiveness of their practice. Even if a murderer confesses to his priest, the priest cannot disclose this - although he can/should counsel the person to turn himself in.
This makes the recording and broadcasting of a confession to be doubly problematic. It might violate the laws regarding surreptitious taping, and it definitely violates the ethics of a religious order.