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Doesn't sound like you're just talking about yourself does it? So I ask you again, how would you know if:

a) any documentation was genuine;
b) what the legal implications of that documentation is;

If you are now saying that you don't know & that you have no legal training or understanding of Egyptian law or the intricacies of Egyptian property & land ownership, then I think that you should make this clear & stop misleading people with talk of "hard evidence."

Finally, who cares if someone sold their appartment & made 25% if it transpires that they never actually owned it in the first place? Eventually someone will end up holding the baby & will be seriously out of pocket.