[FOX SPORTS]

Here is interesting question and answer from the National Letter of Intent website produced by the NCAA:


What happens if I change my mind about attending the institution with which I signed, and I want to attend another National Letter of Intent institution instead?
If you do not attend the institution with which you signed, or if you do not fulfill the terms of the National Letter of Intent, the basic penalty is that you lose one year of eligibility in all sports and must serve one year in residence at your next National Letter of Intent institution.
Is an institution required to grant a complete release if I ask for it?
No. Just as the National Letter of Intent is a voluntary agreement, granting a complete release is voluntary in nature. If an institution denies your request for a complete release, you may petition the National Letter of Intent Steering Committee for such a release. In order to appeal to the NLI Steering Committee, you must provide a copy of the NLI Release Request Form, signed by the director of athletics, indicating "No Release." Once proper documentation has been submitted, the NLI Steering Committee will consider your request.
If my request for a complete release is denied, is the institution obligated to provide me an opportunity for a hearing?
No. You are not entitled to a hearing under National Letter of Intent policy inasmuch as you are permitted to file an appeal when denied a complete release by the signing institution.
If I do not satisfy my National Letter of Intent agreement, may I practice or receive athletics aid at another National Letter of Intent institution?
Yes. The National Letter of Intent basic penalty is the loss of one year of eligibility in all sports and a required one year in residence at the next National Letter of Intent institution. It does not include a prohibition against receiving athletics financial aid or practicing with a team. Is a National Letter of Intent binding if the coach of my sport leaves the institution? Yes. The National Letter of Intent you signed with an institution is valid if the coach who recruited you leaves the institution with which you signed. When you sign a National Letter of Intent you sign with an institution and not with a coach or a specific team.
http://www.national-letter.org/faq/