A letter of appreciation<\/strong> written to a customer is a letter showing a store or company\u2019s appreciation for the customer\u2019s continued usage of the company\u2019s products or services. Such letters are short letters written chiefly to establish and maintain a rapport with the consumer.<\/p>\n Many mega-corporations as well as smaller businesses insist on the maintenance of a good relationship with the consumer, since the entire economy is consumer-centric it is therefore considered beneficial to see to it that he is satisfied at all times.