equitable mortgage home loan release

Dear Members, i had taken a home loan in 2013 and it was done under equitable mortgage,the bank had taken all the original property documents from me,last month sept 2017 my home loan was cleared and i got my property documents back along with the bank noc,my query is isn't the equitable mortgage charge needs to be released by the bank in the sub registrars office,the personnel in the bank said since its on equitable mortgage there is no such requirement,if it was a registered mortgage the release was compulsory,is it true?they just gave me the bank noc letter with stamp,and when they had done the equitable mortgage the intimation of mortgage original receipt they have given me,Please advise if the equitable mortgage charge needs to be removed? and whats the procedure to get it removed iN Pune city Maharashtra