Could someone kindly provide a sample of formal thank you letter?

Question

I had American customers visited my company last week. I want to send them a thank you letter for their visiting, but I am not confident to write a formal thank you letter. I need someone who really can help me. I will be appreciate.

Answer 1

Checkout

http://jobsearchtech.about.com/od/thankyouletters/l/aa041398.htm

It is more important to be genuine and sincere in your letter than to follow any particular formal style.

Answer 2

Please see the link below. There are a few examples to choose from.