While the U.S. federal law only requires one-party consent, many states have accepted different laws. In some states all parties must give their consent or at least be notified that the call is about to be recorded (with necessary opt-out option: if you don’t like them to record the call, you can ask them to stop recording). There also was a case law decision from many years ago (the 1950's) that went to the Supreme Court and affirmed that the federal law does not supersede state authority/statutes unless the call or the tap crosses state lines – that is why each state went ahead and established their own guideline/statute.

States Requiring One Party Notification:

Alabama Alaska Arizona Arkansas Colorado District Of Columbia Georgia Hawaii  Idaho Illinois Indiana Iowa Kansas Kentucky

Louisiana Maine Minnesota Mississippi Missouri Nebraska Nevada New Jersey New Mexico New York North Carolina North Dakota Oklahoma

Oregon Ohio Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia West Virginia Wisconsin Wyoming

States Requiring Two Party Notification:

California Connecticut  Delaware Florida

Massachusetts Maryland Michigan Montana

New Hampshire Pennsylvania Washington