Auto sent notification message

In the past I’ve had auto notifications for late payments, not viewed contracts, etc… however, the most recent ones automatically attached a third-party payer contract to it. I have made no changes and when I looked to see what happened, it said to go into the configuration section and adjust the notification emails. All of my notification emails are exactly as they should be. Why is it attaching a separate agreement to the reminder emails, and how do I turn this off? It looks very unprofessional.