if more than one ESI cards contain the same member in family details than the letest visit to the dispensary for medical benefit with any of card will remove the details other cards
in case a child is linked in both father and mother ESIC cards then when the IP or the child visit the clinic for ESIC based treatment, it gets authenticated, and department removes the names from other cards linked
in another case if a child attains majority and get his / her own ESI card by joining any job, then also the name is removed from parent's card