Does a person have a reasonable expectation of privacy in information given to the post office?

The question of whether a person has a reasonable expectation of privacy in information given to a post office is apparently one of first impression at both the state and federal levels. Guidance, however, may be found in analogous federal cases. In United States v. Miller (1976) 425 U.S. 435, 96 S.Ct. 1619, 48 L.Ed.2d 71, the defendant was charged with various federal violations involving defendant's operation of an unregistered still. Federal agents obtained copies of his bank records by means of subpoenas duces tecum. The defendant contended that he had a Fourth Amendment interest in the records kept by the banks because they were merely copies of his personal records made available to the banks for a limited purpose and in which he had a reasonable expectation of privacy. The high court, in rejecting defendant's argument, stated that the documents obtained contained information "voluntarily conveyed to the banks and exposed to their employees in the ordinary course of business." (Id., at p. 442, 96 S.Ct. at 1624.) The court further explained: