Dear (Mr./Mrs./Ms./Miss) followed by last name,
The first sentence or two should briefly summarize or explain the reason you are thanking the recipient. For example, begin with “As CEO of Business Dynamics, I am writing to thank you for” and continue with your summarization. Mention the time period in which you received the service/product/etc.
In the main body of your business thank you letter, go on to briefly explain how the service/product/contribution affected your company, how it was used, how it raised awareness, helped generate new business, etc.
Express your gratitude for the support of your company, and explain briefly that you want to thank all who were involved or contributed in any way. Give your sincere thanks and appreciation, and explain that you look forward to a continued relationship with the organization.
Hand write your signature directly above the typed version. In general, this type of business thank you letter is suitable for corresponding with another business or organization. If you are thanking employees, simply leave the address off and address it in a more general manner.
The guidelines above will help you write a professional business thank you letter that is genuinely appreciated by the recipient.