If you've decided to go paperless for your utility bills and bank?
The problem is that the design of the process to initiate paperless billing may not actually reflect acceptance and agreement by the customer. The final piece of mail may alert the customer to a tick box that was prefilled with an x, but not in an obvious place. Or maybe it was a poorly worded button, or the active object when the customer only wanted to scroll down the page. Or the text was misleading. The letter gives the customer a chance to undo a mistake. It also adds weight to the company's ability to one day collect payment, and late fees, if the customer does not take up the responsibilities they have committed to.