❖ Ruling on Unfulfilled Vowed Fasts if a Person Dies
Source: Fatāwā Amunpuri by Shaykh Ghulam Mustafa Zaheer Amunpuri
❖ Question:
What is the ruling if someone dies without having fulfilled their vowed (nadhar) fasts?
❖ Answer:
If a person dies without having observed the fasts that were vowed upon him, then his guardian (walī or heir) should fast on his behalf.
❀ Sayyidah ʿĀʾishah رضي الله عنها narrated that the Messenger of Allah ﷺ said:
مَنْ مَاتَ وَعَلَيْهِ صِيَامٌ صَامَ عَنْهُ وَلِيُّهُ
“Whoever dies while he still owed fasts, his guardian should fast on his behalf.”

Summary:
① If someone dies without completing their vowed fasts,
② Then their heir or guardian should observe those fasts on their behalf,
③ This ruling is based on an authentic ḥadīth from the Prophet ﷺ.