USPS Expected Delivery Email for 2+ year old address, didn't order anything, no charges on my cards?

A user received multiple legitimate-looking USPS delivery emails for a zip code they haven't lived in for over two years, with tracking numbers from postage companies like Pitney-Bowes and Shipbob. No purchases were made, no charges appear on their accounts, and Gmail treats the emails as authentic. The user is unsure if this is a scam.