Nagmail
When companies or people won't stop bugging you to remember things, like paying or not dying, through email or real mail.
Your phone bill says, 'You're behind on payments. We're giving you one more chance before we take your phone.'
Your online class sends you a message: 'You skipped class twice. We're watching you.'
Your subscription box company texts you: 'You didn't pay for the box. We're disappointed.'