This is not purely a financial issue.  Generally fellowship programs at a minimum have a website and selection process that is open to the public.  You would receive a letter notifying you of acceptance and the terms.  This would be enough.

Examples of such programs in the USA include those listed below.

Should you receive an externally awarded fellowship, at any time, we will immediately consider your application.  Please let us know.  This need not be before April 1.