Here's an excerpt from an actual piece of mail I received regarding Time magazine. We had a subscription sometime last year, and decided not to renew it (personally, I prefer The Economist). It's been many months since we let the subscription go. So, we get a piece of mail labelled "FINAL NOTICE", looking like something you'd get hand delivered by a beefy Italian named Guido.
SERVICE CONTRACT SUSPENSION
URGENT NOTICE: FOR WHICKEN
Your renewal instructions are past due. Your delivery contract has been suspended until we receive your authorization to continue.
Detach the Re-order form and return at once with your remittance.
Sorry, Guido, I don't want to renew ok? Please don't break my knees.