Are the agricultural lands inherited by the adopted daughter from her paternal uncle, which were registered in her father's name, who then died before returning them to her, considered lawful (halal) or unlawful (haram), especially since her biological father did not object to the adoption or the inheritance?

Firstly: Adoption is forbidden in Islamic law, as it attributes a person's lineage to someone other than their true father.

Secondly: The brother of the deceased inherits if there are no other relatives, and his right is not forfeited by prescription.

Thirdly: If a father grants a portion of his right to his daughter, then the same must be granted to the rest (of his children), unless there is a valid reason that permits preferring her.

Fourthly: Land registered in the father's name to be returned to his daughter does not become her property except with the consent of all adult heirs.

Fifthly: Matters of inheritance are serious, and a mere fatwa is insufficient; rather, they must be brought before the Sharia courts for investigation.