This formal letter can be used to appreciate effort of an employee. This letter has been written like a manager writing to an employee. Please modify it to suit your needs.
As a manager, I just wanted to take a moment to appreciate you for the excellent work you are doing for our company.
In your role as marketing executive in our company, you have demonstrated your abilities to add value to our company increasing our product sales. Your creativity and resourcefulness has benefited our company.
I am totally impressed with the results that your team has achieved with your marketing strategies and has led the company to success.
I am extremely proud of you and your team, and I want to say, WELL DONE GUYS! As a token of appreciation, you will be receiving your incentives at the end of this month.