Sir my father is a banker he has earned all his life from banking job from this he has made his property now if Allaha give him chance of toba what happened to his that property how would we eliminate this part of his property please clearify.
It is not permissible to work in a conventional bank in any position that requires direct involvement in interest based transactions or promotions of interest based products.
Although your father earned his livelihood from a bank throughout his life but the the door of Tauba is not closed. The door of Taubah is still open so if he seeks forgiveness from Allah sincerely then Allah will surely forgive him and guide him.
Once he has made sincere Taubah then he should rectify his life onward. He should make sure that his livelihood is earned through Halal sources in future. He may invest that money in Halal ways and benefit from Halal earning. Allah will make things easier as his Imaan in Allah will get stronger Insha'Allah.
And Allah knows best.
Mufti Ikram ul Haq
Fatwa Center of America