The Nonprofit FAQ

Is there an ID number required when receiving a federal grant?
See the FAQ item http://www.idealist.org/if/i/en/faq/452-125/338-278 for a discussion of D-U-N-S numbers and the central website for Federal grant information http://www.grants.gov.

Use of a D-U-N-S number for Federal grants has been required in the application process more and more frequently since 2003.