This letter is in response to the thoughtful donation of (money, clothing, food) you have provided for our () cause. Our non-profit organization relies solely on selfless contributions made by society to provide for (the purpose).
We would love to extend our sincere gratitude for all your efforts and contribution. Your donation will enable us to purchase (provisions) to ease the challenges of maintaining and running our () organization. Please accept our heartfelt thanks in return for your generosity.
We hope to remain in your care and foster similar initiatives to extend our reach efficiently to (cause) organizations.