Once the Divorce Decree is issued stating that Flat is given in settlement, following is to be done:
1] Obtain Decree of Divorce.
2) If you are from Maharashtra, get your name changed in Maharashtra Gazette (to your Modern name)
3) If flat is on husband's name now apply for transfer of flat in your name depositing Decree of Divorce with society completing all transfer formalities including Undertaking and Bond.
4) Make an Affidavit of Change of Name.
Hope you are satisfied.