The healthcare professional plays a key role in the detection and subsequent channeling of a situation of violence to a judicial level for appropriate investigation. The mandatory reporting of gender violence has become a controversial issue among health care practitioners and victims. The objective of this study was to analyze the quality of the way in which injury reports on victims of gender violence is completed, through an analysis of the information they include, the readability and the degree to which the document can be understood. A retrospective study in a sample of 197 injury reports were performed from health services (primary care, hospital services and emergency services). We analyzed 22 variables related to the content, readability of the document, the victim’s identification data as well as identification of the doctor responsible for assistance, the moment of assistance and the characteristics of the injury. The most frequent deficiencies in the data are identification of the doctor responsible for medical attention, the date on which the aggression occurred, a description of the injuries and the judgment of compatibility between the cause of injury (according to the victim) and the actual injury they have. The injury reports do not conform to the legal requirements needed in a document of such extraordinary importance. Greater awareness in health professionals concerning the importance of the injury report as a medicolegal document is needed so that the correct information can be provided to the relevant judicial authority.Significance for public healthViolence against women is now widely recognized as a worldwide serious violation of human rights, with important consequences for women’s physical, mental, sexual, and reproductive health. On many occasions, violence goes unreported. Emergency departments are often the first point of access to health services for women experiencing gender violence and the healthcare professional plays a key role in the diagnosis and treatment of a situation of violence that are not declared. The report issued when there is a situation of suspected gender violence, contains information that will be transcendent for knowing the circumstances that surround the violence that abuse causes. In this study we found serious deficiencies in the injury report so the information does not conform to the legal requirements needed in a document of such extraordinary importance. Efforts are needed to raise awareness among health professionals about the importance of providing the correct information.