Lisbon Convention

[Tomas]

Your interpretation of Lisbon convention is too strict and narrow, you probably didn't read it.
Btw. USA only signed but didn't ratify it, though for this particular thing it is probably not important.
UoPeople degree is perfectly valid in EU, you can use it on your CV, you can use the bachelor or master title.
However, well, sure, for some other important purposes, it is not good enough.
I am 100% sure you would lose the legal case.
That would be funny, UoPeople degree impossible to use for admission on most RA universities in US, but perfect for further studies on all state universities in EU?

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Btw. I live in EU and our country has the approach that perhaps goes way too much in line with words of Lisbon, copying summary: "recognition can only be refused if the qualification is substantially different from that of the host country". So we had recently a case of someone with degree from top US uni (UC Berkeley, not sure), but he didn't get the recognition here - sure university is more than legit but the degree content was substantially different from those here. (Also it was not 2 years like here but 1 or perhaps 1,5 years masters.)
So it is not like there is an automatic recognition of everything between countries that ratified it.