When a breach occurs and you were exposed, the company is required to send you a notification letter with an explanation and information on what to do.

FORBES: Identity Theft: What You Need to Know

Apple will create a website for people interested in cashing in on the settlement and send an e-mail notification to roughly 23 million customers.

CNN: Apple settles suit over in-game iTunes purchases by kids

If someone tries to contact the user, their action is recorded by Microsoft's servers, which then send a notification, reactivating Skype so it can handle the activity.

BBC: Skype slashes battery use for Windows 8 system launch