بسم الله الرحمن الرحيم
Asking for money can be interpreted as to request for isal-e-sawab. So you should do sadaqah and charity extensively on behalf of your deceased father and also read the holy Quran etc more and more and convey its sawab to him.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.