United States v. Greenfield: A Triumph of the Fifth Amendment's Act of Production Privilege; or Confirmation that the Privilege Can Be Entirely Abrogated by Any Act of Congress, or Even by a Treasury Regulation?

By Caroline Rule
The Tax Lawyer 

In 1976, in Fisher v. United States, the Supreme Court first recognized the "act of production privilege" as being a necessary component of the Fifth Amendment's privilege against self-incrimination. A grand jury subpoena or Service summons does not violate the Fifth Amendment just because documents the government seeks are incriminating; pre-existing documents are not the result of government compulsion.