Joseph: False. A civil court in such a case has the authority to attempt to determine whether one is lying by claiming to be “Kosher”. And the plaintiff will always win such a case because there is no case we can make that we have a monopoly on defining the word “Kosher”. It’s not Kosher for us, but it’s Kosher for them.
Also, “not recommended” is a much more accurate term. The Tablet K is an Eid Echad telling us it’s Kosher. As long as the Mashgichim and Rav HaMachshir are Frum people, it’s technically Kosher. How reliable they are, I have no idea. But unless it’s a known fake Hashgacha (and I mean really fake), one would not be Over on Issurim like Neveilah and such if one ate it.