I purchased HP ink that was labeled as authentic HP ink in unopened packaging. HP 950XL Black and 951 Tri-color (Cyan, Magenta, Yellow) Combo Saver 4 cartridges in one pack. The packaging appeared authentic. I received the ink in a timely fashion and put it in my office drawer for when I ran out of ink. My HP printer won't print if one of the colors is out, so I wanted to have refills on hand so I wouldn't lose any work days of printing. Two months after I received it, my yellow ink ran out. I opened the authentic looking HP package and found... a totally fake counterfeit cartridge. Didn't look at all authentic. No HP logo on it or anything. I tried it in my printer just to see and of course, my printer rejected it and gave me an error message. I contacted Blinq. They told me i was out of luck because it was beyond 30 days. I replied to them with photos of the ink they sold me and what authentic ink cartridges looked like. They then stopped replying entirely. Ink is expensive. Fake ink won't work in my printer. I paid for authentic ink. Blinq owes me a refund. I told them I'd gladly send them their fake cartridges back at their cost, but they won't respond.