New York is a one-party consent state. This means that only one party must consent to the recording of an in-person or telephone conversation. It is an E felony under New York's wiretapping law to record a conversation without at least one party's knowledge.
Massachusetts is a two-party consent state that requires the consent of any individual whose voice is being recorded. Recording another individual's words without the individual's knowledge or consent is a felony in Massachusetts.
If a person recorded a conversation in NY, while living in NY, of a conversation with a person who is in MA, living in MA, and their legal case is discussed in an MA court - which state law governs the admittance of evidence into the case? Will the NY person be able to use the recording of a conversation with the MA person?