Learn how to write an employee appreciation letter with these templates and examples. Download the template for free (PDF or Word).Your employees work hard. Use our employee appreciation letter templates to thank your employees for their effort. 5 Employee appreciation letter best practices 1) Be timely. A formal appreciation letter or an email to your employees expresses your gratitude for their contribution to your business. Employees are your business's lifeblood, so use a few of these clever ideas to show them you care. They deserve it and you will benefit, too. The following employee applications require staff to download Imprivata. Instructions are available here.