They do, but not to the same extent as ID security companies. A bank will alert you if there's any unusual activity regarding your account or if it detects a fraudulent transaction. But that's as far as banks go. They don't monitor any other unauthorized use of your personal information, such as your Social Security number, nor do they conduct any other credit and ID monitoring. An ID theft protection service providers will go to much greater lengths to help you protect your identity and assets.