Messer Medical Austria’s online patient document submission site, built on the CodeIgniter 4 framework, is designed to provide a simple, understandable and practical interface for physicians. The system includes a document upload module, an administration interface to manage users and submitted documents, and integrates with Microsoft’s OneDrive sharing system via API calls in the background. During the implementation, special emphasis was placed on captcha protection, authentication and full logging, ensuring security and process transparency.