The prevention science has endorsed standards for evidence related to research on programme evaluation. However, some controversies persist regarding its application in the provision of family support under the European Positive Parenting initiative. This Special Issue aims to map the expansion of preventive family support programmes in Spain and to contrast the quality of the evidence against the prevention standards according with the European Family Support Network. Members of the Spanish Family Support Network made up of entities in several sectors identified 57 programmes implemented in Spain and filled in a formative evaluation sheet for each programme. The articles in this issue analysed the results of four main aspects in all programmes: description, implementation, evaluation, and impact/sustainability. The findings will inform the scope and variety of support provided and the quality of programmes in Spain, providing guidelines for improvement and addressing challenges to reinforce quality assurance in child and family services