I do not feel that I can get an accurate answer from HP regarding a matter of concern. I have a very seldom used HP8620 printer. It has been enrolled in the "Instant Ink" program for more than a year and a half along with an HP extended warranty plan. I have not utilized the original cartridges that I had purchase as the first replacements yet. ( I bought them prior to joining the instant ink program). HP has sent me a set of the Instant Ink cartridges ready for their first use many months ago. Since these are the first set I have not been charged the monthly fee yet. I accidentally let the hardware extended warranty expire by one month. The question: If I discontinue the instant ink program and attempt to utilize the new cartridges does HP have the wherewithal to prevent them from functioning?
NOTE: I have two other HP printers under extended warranty that DO utilize the instant ink program and the cartridges.