Digital receipts are revolutionizing the retail industry by offering a dynamic alternative to traditional paper receipts, providing retailers with valuable customer insights that enable AI-driven personalization. This transition is exemplified by the increasing adoption of digital receipts by UK retailers, with a quarter now offering them exclusively. Digital receipts transform sales data into real-time, relevant recommendations, enhancing customer loyalty apps and driving post-purchase engagement. MongoDB plays a crucial role in this transformation by providing a flexible document model that allows retailers to store and analyze detailed transactional data efficiently, facilitating immediate personalized product suggestions and improving customer engagement. This approach addresses the challenges of capturing in-store customer journeys, which are often incomplete due to the prevalence of paper receipts. By centralizing transaction data and integrating with POS systems, retailers can create a seamless, personalized shopping experience that enhances app adoption, boosts revenue, and strengthens customer loyalty. Notably, retailers like Albert Heijn have successfully implemented digital receipts using MongoDB Atlas, resulting in significant cost savings and improved customer experiences. Ultimately, digital receipts not only reduce costs and promote sustainability by eliminating paper waste but also provide a competitive advantage by unifying physical and digital touchpoints, thus driving customer engagement and business agility.