Final answer:
The acceptability of a cashier holding a customer's mobile device to scan a coupon depends on the store's policy and the customer's comfort level. Generally, customers should hold their own devices, and cashiers should respect their preferences and privacy.
Step-by-step explanation:
The acceptability of a cashier holding a customer's mobile device to scan a coupon can vary depending on the store's policy and the comfort level of the customer. Typically, it is preferable for the customer to hold their own device while the cashier scans the coupon, both for security and privacy reasons. If the barcode is not easily scannable, the cashier might ask for permission to hold the device. However, it is crucial that the cashier respects the customer's preferences and handles the device with care if given permission to do so.
In general, it's best practice to avoid touching a customer's personal belongings, including mobile devices, unless it is absolutely necessary and with the customer's consent. Alternatives include using a handheld scanner that can reach across the counter, or having the customer forward the coupon to a store's email if technology permits. This not only helps in maintaining a professional boundary but also in ensuring hygiene, especially given health concerns in recent years.