The aim of this multiphase mixed-method study was to improve access, flow, and consistency of information transfer for multitrauma patients leaving the Emergency Department. Methods included literature review, focus group interviews, chart audits, staff surveys, and a review of international trauma forms to inform an intervention developed with a researcher-led, clinician stakeholder group. Analysis included descriptive and inferential statistics. Baseline data revealed variability existed in patient-care documentation, showing little standardization. Improvement strategies implemented included a gold standard for information embedded in handover tools, raising staff awareness of complexities for information transfer. Improvement was seen in communication between wards coordinating transfer, improved documentation, decreased information duplication, improved legibility, and increased ease and efficiency in navigating to key information. Improvement in communication at patient transition is essential to continuity of safe, effective care, and is impacted by complex interactions between multiple factors. Difficulty increases for patients with high acuity.