In Australia there is an absence of an elder abuse screening instrument that is widely accepted and that has been designed with, and for, end-users. This study aimed to develop an effective and acceptable elder abuse screening instrument by engaging with frontline professionals through a co-design process. To date, co-design methodologies are recommended to ensure successful adoption and implementation of complex interventions by end-users, but the scholarship is limited on the specific steps to achieve this as well as the pragmatics of such work. Addressing this lacunae, results demonstrate how qualitative methods align with a co-design approach; underscore the importance of multidisciplinary perspectives; showcase how to streamline complex processes into routine practice; and accentuate the importance of good design. These are valuable insights necessary to develop inter-professional and community-based solutions to the challenge of elder abuse.