SEO Sai Gr. Hosp.
                
                   208190 Points
                   Joined July 2016
                
               
			  
			  
             
            
             "............on the share certificate my dads name is there as XYZ(HUF)........"                Wrong notion.
Look at it with correct notion as: " on the share certificate name is there as XYZ(HUF). whose Karta was my father, but after his demise a new Karta is to be assigned."
Consult a local CA who can guide you to change Karta of HUF and submit required papers to society.