What should you do if a customer refuses to return the Chicken McNugget they complained about?

When a customer refuses to return a Chicken McNugget they complained about, finding the source of the product and reporting the incident is essential. This action ensures that any potential quality issues are identified and addressed. It is crucial for maintaining the standards of food safety and quality that McDonald's strives for. By understanding how the situation occurred—whether it was a problem during preparation, a supply chain issue, or something else—employees can take the necessary steps to prevent similar complaints in the future. Additionally, reporting the incident contributes to overall product quality control and customer satisfaction.

The other actions, while they might seem reasonable in different contexts, do not effectively address the need for quality assurance or improve customer experience. Simply denying a refund without further investigation fails to show an understanding of customer concerns and can lead to dissatisfaction. Seeking supervisor approval for a refund may not be the most proactive approach when the main issue at hand is product quality. Ignoring the situation altogether disregards the customer's feedback and could result in further issues down the line. Therefore, investigating the source of the product and addressing the complaint systematically is the most appropriate course of action.