Quick Answer HP Instant Ink cartridges are tied to your subscription, not just to your printer — when you cancel, HP's servers flag those cartridges as "subscription-only," so the printer stops recognizing them even though they're genuine. The fix usually involves either replacing the Instant Ink cartridges with standard retail HP cartridges, or restarting the subscription sync process if you canceled by mistake. If the printer still won't sync correctly after that, the account-to-printer connection itself may need to be reset. If you canceled HP Instant Ink and your printer suddenly refuses to print — even though the cartridges are genuine HP ink — you haven't done anything wrong, and your printer isn't broken. This is expected behavior, just not something HP explains clearly at signup. If you've been searching for a straightforward instant ink guide to explain what's actually going on, here it is. Instant Ink cartridges aren't the same...