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Re:Cartridge cannot be used until printer is enrolled in HP ... by xadhominemx on Saturday January 18, 2020 @09:17AM (#22084543)
The cartridges are not particularly dangerous, nor does HP recycle them (common misconceptions). The reason they send you a prepaid envelope is so that you mail the cartridge back to them instead selling it to a remanufacturer.

Edit: stop downvoting me, I am a printing industry expert

Re:Cartridge cannot be used until printer is enrolled in HP ... by mark-r on Saturday January 18, 2020 @01:07PM (#22085905)
Appeals to authority are unlikely to move this crowd.
Re:Cartridge cannot be used until printer is enrolled in HP ... by xadhominemx on Saturday January 18, 2020 @07:17PM (#22088415)
Not so much an appeal to authority as this is a fact I am correct about