In the case of United States et al. v. Bisceglia, 1974, the Supreme Court ruled in favor of the government's right to issue a John Doe summons without knowing the identity of an individual who may be liable for unpaid taxes. The defendant, Mr. Bisceglia had found $1,500 in old currency and exchanged it at a bank; however, he did not report this income on his tax return. The IRS issued a John Doe summons to identify any potential tax liability associated with this unreported income but was challenged by Bisceglia who argued that such summonses required specific identification information about potentially delinquent taxpayers before they could be legally issued. The court held that while there were statutory requirements for issuing such summonses - including good faith belief that someone might owe taxes - these did not include knowledge of their identity or exact amount owed as prerequisites for issuance under Section 7609(f) of Internal Revenue Code (IRC). Therefore, it upheld validity and constitutionality of John Doe summonses when used appropriately by IRS.

In the dissenting opinion for United States v. Bisceglia, Justice William O. Douglas argued that the IRS's use of John Doe summonses was unconstitutional and violated citizens' Fourth Amendment rights against unreasonable searches and seizures. He contended that such summonses were akin to general warrants, which are prohibited by the Constitution because they do not specify a particular individual or place to be searched. Furthermore, he believed these summonses gave too much power to administrative agencies like the IRS without sufficient judicial oversight or protection for individuals' privacy rights. In his view, this case represented an overreach of government authority into private affairs under vague pretenses of tax collection efforts.