How can cashiers ensure customer information is handled securely?

Handling customer information securely is essential for protecting both the customer and the integrity of the business. Adhering to data protection policies is crucial as these policies are designed to safeguard sensitive information and ensure compliance with legal and regulatory standards. This includes guidelines about how to collect, store, and use personal data, keeping it confidential, and limiting access to authorized personnel only. By following these established protocols, cashiers can significantly reduce the risk of data breaches or unauthorized access, thus maintaining customer trust and the company's reputation.

The other options do not support secure handling of customer information. Processing all information openly could expose sensitive data to potential risks, while sharing information with all employees undermines confidentiality. Allowing customers to handle their own information might not ensure proper security, as not all customers are aware of safe data practices. Therefore, adhering to data protection policies is the most reliable approach for ensuring customer information remains secure.