If you would like to confirm that you have received a charitable contribution, here is a sample template you can use to write a letter acknowledging a charitable contribution.
To [Recipient name]
Dear, [Recipient name]
We would like to extend our gratitude towards your generous donation towards [Name of organization] that works towards [Mission of organization]. Your charitable contribution to this cause will allow us to make a significant positive impact on the lives of many people.
It is because of people like you that our organization is able to provide aid for the needy. This contribution will go a long way in furthering the fulfillment of our mission. Your ability to make a change in the world is exponentially greater if you contribute to such charities.
Thanking you again for your generosity.
[Name of organization]