What is the ruling on a father writing over a portion of his possessions to his daughters during his lifetime, taking into consideration that he has other heirs, both male and female?

There is no objection for a father to register some of his property to his daughters, making them owners of it, if it is transferred to them during his lifetime and they dispose of it as owners. In this case, it is considered a valid gift. However, if it is not transferred until after his death, then it is considered a bequest to an heir, which is not valid unless the other heirs agree, based on the Prophet's (peace be upon him) saying: "Indeed, Allah has given every rightful person his right, so there is no bequest for an heir."