If you would like to thank a volunteer for their service, here is a sample letter of commendation for a volunteer.
To,
[Name]
Dear, [Name]
We would like to thank you for volunteering to better our cause. Your donation to the [campaign name] has been commendable.
Your relentless hard work is inspiring and it has significantly improved the results. Your volunteer work has been incredible.
Sincerely,
[Company name]