CUSTOMER IS ALWAYS RIGHT.
customer is always right.: translation
The customer is always right.
Prov. In order to keep customers happy, the people who serve them should always obey their wishes. (Often cited as a principle of good business dealings; customers sometimes say it to the people serving them in order to try to get good service.) •
When I began working at the gift shop, my boss told me, “Remember, the customer is always right, no matter how stupid or rude you may think he is being.”