We've rounded up 10 customer service email templates so you don't have to write each message cold. These will enable you to assist more customers at scale.A successful small business is like a family. Sending out customer appreciation letters is an excellent way to connect with your clients. Learn how to write a customer appreciation letter here. Get to the point quickly and be concise. , but don't be impersonal or abrupt. Authorization Letter. Thank you for contacting PHX Customer Service. Make a customer service agent cover letter that gets interviews.