How to Unblock ATM card which I found again ?

I blocked my atm card when it lost .And again i found my atm card how to unblock I don't know.Can you please help me to unblock my card.

Once a card is blocked, it can't be unblocked. All you can do now is submit request for new card and get one. But before that, just to make sure, call card customer care of your bank, numbers are listed on back of every card and ask them if there is any procedure to unblock the card .