Unsubscribe Act of 2019 This bill prohibits negative option agreements online unless the terms provide the consumer with a way to cancel the agreement before incurring further or increased charges. For example, under free-to-pay conversion contracts, where a consumer is initially charged a nominal introductory rate and an increased rate after the introductory period ends, the provider of the good or service must require the consumer to perform an additional action, like clicking a confirmation button, before the increased rate takes effect. The bill also requires that certain notifications are provided to consumers in the context of other forms negative option agreements online, such as notice 30 days in advance of an automatic renewal.