Attach your organization's letterhead or proof of 501(c)(3) status as a single PDF or Word document. Tell Us About Your Organization.Please download, fill out and include this form when submitting any check or money order donations. NOTE: Tax ID letters for contributions. Maximize the impact of your donation with your company's matching gift program. Our Tax ID (EIN) is 232290505. 1. Contact your donor-advised fund administrator. 2. Specify the fund where your gift should be directed. 3. Attach your organization's letterhead or proof of 501(c)(3) status as a single PDF or Word document. Tell Us About Your Organization.