As per Section 2 (f) of the Domestic Violence Act, 2005 which defines 'domestic relationship' the girl and her parent will be covered under by the Domestic Violence Act. Considering the facts given it is clear that the girl has been subjected to physical abuse which can be covered under Section 3 (a ) of the Domestic Violence Act and hence a complaint can be filed for Domestic Violence against the parents. As an acquaintance to the girl , you can inform the Protection Officer of your concerned locality as allowed under Section 4(1) of the Act. A Protection Officer is elected under Section 8(1) of the Domestic Violence Act by the State Government and has the responsibility to keep the aggrieved woman in safe custody and initiate legal proceeding against the offenders. The Protection Officer or the aggrieved woman can approach the Judicial Magistrate of the First Class or the Metropolitan Magistrate to take action against the offenders. If the Magistrate is satisfied that the incident is covered under Section 3(1) of the Act as per the evidence produced, then he can pass a variety of orders to protect the aggrieved woman. Therefore as an acquaintance, you can inform the Protection Officer to initiate the legal process to help the girl in this situation.