&gt; what constitutes adequate notice of cancellation<p>While that&#x27;s one aspect of the situation - and yes, a matching notification requirement is sensible - this discussion of &quot;cancellation&quot; is missing the important question: <i>were goods delivered or services used?</i><p>Using a newspaper publisher as an example, if we&#x27;re talking about a simple contract (for either a predefined period or specific termination criteria) where some amount of money is regularly exchanged for the regular <i>delivery</i> on dead  trees or electronic means (email) of their publication, then there is a debt that needs to be repaid. The publisher fulfilled their obligations created by the contract.<p>However, this is a very different situation if no debt has been created. If the contract was a regular payment to gain access to their back archives, if you haven&#x27;t used their services, then there isn&#x27;t a debt[1]. Also, I suspect most businesses using contracts of this type will include some sort of clause that terminates all of their obligations if the payments stop.<p>The point being that there is going to depend heavily on the specifics of the situation, so it&#x27;s dangerous to generalize.<p>[1] Some jurisdictions might treat use of the service separately than a &quot;retainer&quot; for access. This doesn&#x27;t really change anything, though it might make the situation much more complicated.