Which option is NOT considered an appropriate finishing touch in customer service?

Sending a postcard thanking a customer for specific help may not be seen as an appropriate finishing touch in customer service because it could be perceived as less personal or more generic compared to other options. The intention behind customer service follow-ups is usually to convey gratitude directly related to the customer's experience or interaction, and a postcard can lack the immediacy and personal touch that handwritten notes or phone calls provide.

On the other hand, expressing appreciation through a handwritten note or following up with a phone call brings a personal element that customers often value highly. Providing a business card is a practical approach, allowing customers to contact the service representative directly in the future, fostering a sense of openness and ongoing relationship. Thus, while gratitude should always be expressed, the medium and presentation can significantly impact the effectiveness and appropriateness of that gesture in customer service environments.