Is it permissible for children to fast on behalf of the deceased for missed Ramadan fasts, and must a married daughter seek her husband's permission to fast on behalf of the deceased?

If a person dies and was unable to fast or make up for missed fasts due to a continuous excuse until death, then there is no make-up or feeding required on their behalf. However, if they were able to make up the fasts but died without doing so, it is legislated for their guardian to fast on their behalf. This is the preferred view among many scholars, who cite authentic hadiths as evidence. If the one fasting on their behalf is a married woman, she must seek her husband's permission, as it is a non-obligatory fast.