See #67.
Cruz was a citizen at birth in Canada and had no requirement to file papers anyplace.
Maybe you should try this in a larger font, maybe even all caps, because no one hears you. He was a citizen at birth of Canada. You don’t even know for a fact he was born in Canada or if he was found under a cabbage plant in Cuba.
A person born abroad is presumed an alien. In order to overcome the presumption, it is necessary to present evidence for adjudication. I don't know if that fits your defintion of "filing papers someplace," but his Canadian BC plus his mothers Delaware BC are not enough to make him a US citizen.