The city civic body has told the Bombay High Court that it has no powers to delete a birth or death-related entry from its records, while responding to a single mother's plea seeking a birth certificate for her child without the father's name. The Brihanmumbai Municipal Corporation's birth registration department filed an affidavit in the court yesterday, stating that it did not have the authority to issue a birth certificate in the present case, without the name of the child's biological father.