Every library I've been to has told me the return date when I checked out the book and stamped on the library card or receipt you get when checking out the book. For decades there was no phone call/ notification, you'd get a letter in the mail after you'd already started racking up late fees.
Regardless of how broken their notification system is, keeping track of the return date has always been the borrower's responsibility.
Regardless of how broken their notification system is, keeping track of the return date has always been the borrower's responsibility.