Summary

Yosef Karo Shulchan Aruch — Choshen Mishpat 20

With respect to an inheritor that was a minor when his relative died, however, who comes with claims after he becomes an adult, and says I have no witnesses and proofs, and then after he is found liable and leaves court and others tell him that we know your father has testimony that will void this ruling, or someone told him your relative deposited a proof, he may bring it and void the ruling because a minor inheritor does not know all the proofs of his relative.
Source: Wikisource

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