If you've ever wondered how seriously Congress and the courts take debt collection regulation, this case, involving a combination of a misaligned clear plastic window on an envelope and poorly formatted letter, that merely let a QR Code (barcode) and a bare account number show, is quite telling.
Convergent Outsourcing is a debt collector. The company sent a letter to Courtney Douglass which, due to the misaligned window, also displayed her account number and the barcode (which could be scanned to show how much she owed). But nowhere on the envelope did it say what the letter, or the account number, pertained to.
Still, the Third Circuit held that the company could face a Fair Debt Collection Practices Act (FDCPA) lawsuit over the "invasion of privacy."