For some reason, I had always thought divorce papers had to be delivered by a person, but I guess not. Mine came in the mail one day, out of the blue, with a big heading, "You Are Being Sued for Divorce", as if it were just another bill. In fact, it kind of felt that way, as if my then-husband was saying, "I Was Married to You and Now You're Gonna Pay, Because You Owe Me!"
And if them marrying someone else doesn't work, just wait 'til they start having kids together.