This case study details the automated invoice processing system implemented by ELFS Shared Services, which processes approximately 1.3 million invoices annually for 14 NHS trusts. The document outlines the challenges faced with manual invoice checking methods prior to 2014, including human errors and inefficiencies. It describes the transition to an automated system, highlighting frustrations with the previous provider's platform and the decision-making process involved in switching to Xelix. The case study emphasizes the importance of thorough due diligence and testing, which led to a successful transition to Xelix's AI-powered invoice checking system. The benefits of this new system include improved accuracy in identifying duplicates and reduced false positives, along with ongoing support from Xelix. The document also mentions future plans for further automation within the system, including checks on duplicate vendors and fraud detection, showcasing ELFS's commitment to enhancing their invoice processing capabilities.