What is incumbent upon me to do regarding a house registered in my paternal uncle’s name, from which my father evicted my paternal uncle’s sons and then inhabited it himself, and then built upon it, and now my father is asking me to obtain a waiver from my paternal cousin, the heir, who has apologized because the part that his sons inhabited is registered in his father's name?

Usurping the rights of human beings is a major sin, and a severe warning has been issued concerning it. Whoever usurps even a handspan of land unjustly will have it tied around his neck on the Day of Resurrection from seven earths, especially if the usurped property is a house and its owners are orphans.

Therefore, if the house was truly owned by your deceased uncle, then your father committed a great wrong by usurping it from his nephews. It is incumbent upon you to inform them of the matter and reconcile with them regarding the structure you have built. If they refuse reconciliation, then scholars differ on whether the structure should be demolished, compensated for, or its value given.

What you lose today is far less than having this house tied around your neck on the Day of Resurrection. If your father is alive, he must repent and seek forgiveness from his nephews. If he is deceased, then you must seek forgiveness for him and ask for pardon from your nephews.

However, if the house is registered in their father's name but in reality, it does not belong to him, there is no harm in keeping the matter secret from them and striving to correct the situation and prove the truth of the matter, because courts rule based on documents.