The Pennsylvania Supreme Court has held that the Pennsylvania Constitution protects an individual bank depositor's records from unauthorized police subpoenas when no legal proceedings have been instituted against the individual.
Commonwealth v. DeJohn, 403 A.2d 1283 (Pa. 1979)
Jane E. Miller,
Pennsylvania Constitutional Law - Search and Seizure - Right to Privacy - Individual Banking Records,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol18/iss2/11