The user at any time might cancel the subscription of the HP Instant Ink Program. On the other hand, the user would be retroactively billed for the free service you initially had been using. Most of the working habits of the user vary from month to month. So, the HP users are not able to derive maximum benefits from this program. There is a presence of a few types of conditions or restrictions inside the program. So, the user should carefully go through the program. According to the answers derived through HP Printer Support Team, HP Instant Ink Cartridges do not perform or execute the work, once the current billing period has ended, and the user needs to return it back to the HP officials. For continuing printing post the billing cycle, the user needs to be certain that he or she is having standard replacement ink cartridges, which is ready to be used inside the printer. If the user is not having postage-paid envelope provided by HP, the user has to go to Recy...