
No, seriously, this is worth following up. Here is an extract from this IRS publication about who is exempt from having to obtain an EIN:
It is of course possible that the RDFRS still is a charitable organisation, but not one operated exclusively for the purposes listed by the IRS.Exempt Organizations
Definitions:
Tax Exempt Organization: A tax exempt organization is a non-profit organization
that is exempt from certain taxes because it is described under Section 501 of the
Internal Revenue Code. Certain organizations are required to apply to the Internal
Revenue Service for a determination letter that grants them formal tax exemption,
while other organizations are treated as tax exempt as long as they are organized
and operated under an applicable section of the Code.
IRC Section 501(c)(3) Organization: This is an organization that is organized and
operated exclusively for one or more of the following purposes: charitable, religious,
educational, scientific, literary, testing for public safety, fostering national or
international amateur sports competition (but only if none of its activities involve
providing athletic facilities or equipment), or the prevention of cruelty to animals.
To qualify, the organization must be a corporation, community chest, fund, unincorporated
association, or foundation. A trust is a fund or foundation and will qualify.
However, an individual or a partnership will not qualify.