I've purchase the OfficeJet Pro 6960 about 2 years ago, had no problem with it. Did NOT engage in the HP Instant ink. Recently I replaced all 4 cartridges, and now I get the message "Cartridge can not be used until printer is enrolled in HP Instant Ink".
The Printer and the cartridges were purchased in the same store in Israel. Anything I've tried online failed to help.
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