This taping thing is highly over rated. Tape the friggin call. They have no way of knowing if you are or aren't taping.
If you are suing in Federal Court, the tape can be admissible as evidence regardless of what state is involved.
Outside of California, I'm not aware of any state's statutes that provides a private right of action against someone who fails to provide disclosure a call is being recorded.
And in a 2 party state, I think you'd be hard pressed to find a DA to pursue a criminal charge of recording a phone call, initiated to or from your home phone, when you had a reasonable expectation that the contents of the call would violate the law.