What is considered best practice for handing a sandwich to a customer?

Placing the sandwich on the counter for the customer to grab is considered best practice, as it promotes hygiene and gives the customer the opportunity to pick up their order at their own convenience. This method minimizes direct contact, which is particularly important in food service to reduce the risk of cross-contamination. Customers appreciate having control over their order's handling as they can pick it up themselves, ensuring they feel comfortable and satisfied with the service. Moreover, this approach allows for a more organized service environment, where the customer has clear visibility of their order without the complications that can arise from direct handoffs.

The other methods, while they may seem convenient in certain contexts, might introduce potential issues such as confusion over order accuracy or misunderstandings regarding any additional items or receipts.