Bismi Allahi wa salatu wa salam alaa nabiiyuna Muhammed wa alaa alihi wa ashabihi ajmaeen.
Fasting is not a form of worship that one can perform on another's behalf. So if a loved one passed away and he or she had days of Ramadan to make up, the family members should pay the redemption fee (fidyah) for the days missed on behalf of their deceased.
