Dear subscriber: I appreciate your proactiveness in paying your bill. You had actually paid enough to cover you for the entire year by the end of April.

And you continued paying.

And now your account is closing, and I'm sending you a check for over $1000

This was probably unnecessary.

pleasantly baffled, Syl

I sure wish I could incautiously overpay bills to the tune of $1000 and not care enough to check in on it. Someone's getting their Christmas shopping paid for, anyway.