When dealing with Amazon or any online retailer about package delivery issues, users often find themselves needing to substantiate claims of non-receipt. Begin by tracking the package through Amazon’s shipment tracking service to determine its last recorded location. If the package seems to have been marked as delivered without your receipt, gather any relevant documentation, such as screenshots of tracking details, emails, or any correspondence with the delivery service. Additionally, consider checking with neighbors or your apartment's front office, as packages might be misplaced. When you communicate with Amazon's customer service, ensure you mention the steps you've taken and the evidence you've collected. Clarity and thoroughness will enhance your claim's credibility. Finally, keep a record of all communications for future reference. Understanding the process can empower you to tackle potential disputes effectively, ensuring that your shopping experience remains positive.