Learn how to write the best donation request letters to secure support for your nonprofit, including six templates to get started. Learn how to write effective fundraising letters that inspire more support from donors.Explore best practices and templates in this comprehensive guide. A simple donation letter sample can start with, "You've been a big part of our organization's fabric over the years. Does anyone have a sample letter soliciting donations from local businesses they would be willing to share with me? Go to Product Support and fill out the information for your event. Include the nonprofit's EIN so the the donor can to check the charity's tax-exempt status with the IRS. A sample donation request letter template from the University of California. Understand your audience and tailor your appeals accordingly. To assist your donor, your organization should download the form, and fill out Part 4 for them.