Employee Matching Gifts Employee Matching Gifts Print Glossary Here's how to make a matching gift: Matching Gift and Volunteer Grant information provided by Ask your human resources department about your company's matching gift policy. If your company participates, send the completed form to LLS with your donation. Your company sends the matching gift to LLS once they receive our verification. Please mail all gifts and forms to: The Leukemia & Lymphoma Society Matching Gifts 3 International Drive, Suite 200 Rye Brook, New York 10573 LLS's tax identification number is 13-5644916. If you have questions, contact our Matching Gift Administrator.