Society asking to pay transfer fees against property receive

We(my self and my wife) have purchased a flat in cooperative housing service society in 2014 in joint name at ahmedabad. In society we were registered as a members with joint name and share certificate was issued by allocating 5 shares on both names with active member as my wife. There after in 2016, I have gifted my part to my wife name with registered gift deed by paying stamp duty. After became a single owner, my wife(who is sole active member and owner of flat) have made application to update the mutations and share certificate in society. Now society is asking her to pay half transfer fees of total transfer fees Rs.15000/- against my(was also a co-owner and share holder as passive member) half part received as a gift. Am I liable to pay such transfer fees to society? Help me..