We have an HP printer and are signed up to HP instant ink. The last cartridge we put in stopped working when still quite full. Message states the cartridge is not authorised.They had sent me the cartridge! Got support from HP after going all round the houses on their website. They would send me new cartridge. New cartridge arrived in a couple of days. But when I install it, I get the same result that the cartridge is not authorised.Meanwhile, I've discovered that without a cartridge fitted the machine won't scan either. A web search has also revealed that there is a class action in the USA for exactly this fault, which suggests it is deliberate to force HP customers to buy ink in addition to the cartridges they get under the instant ink scheme. I've decided not to waste more time and buy another printer, but not HP now or ever!
