Is money collected for Hajj and intended for the deceased father considered part of the estate, and is it permissible to use it to pay off the deceased's debts or to give it as an ongoing charity?

Since the father was unaware of the money his daughter was saving for him for Hajj until he passed away, the money remains the property of the daughter. This is because acceptance of the gift, which is a pillar (essential component) of a gift, was not realized. Furthermore, the daughter's intention was only to save money for her father specifically for Hajj, and not an absolute gift. The daughter may dispose of this money as she deems fit, such as paying off her father's debts or establishing an ongoing charity (sadaqah jariyah) for him.