Another reason to offer this money back guarantee when selling products online: you&#x27;re already doing this whether you want to or not.  Your customer&#x27;s credit card company will usually offer a chargeback within 90 days, and then you&#x27;ll cop the penalty fee for the chargeback.  You may as well offer the same guarantee as the cards do, but encourage the customer to come to you instead.  You&#x27;ll avoid the fee and potentially get intel on what problems customers are having with your product.