According to the NY Times:
For students admitted to Texas Christian University, a notice informally known as the “fear of God letter” will read something like this:
We recently received your final high school transcript. While your overall academic background continues to demonstrate the potential for success, we are concerned with your performance during the senior year, particularly in calculus. University studies are rigorous and we need to know that you are prepared to meet T.C.U.’s academic challenges. With this in mind, I ask that you submit to me, as soon as possible but no later than July 31, 2012, a written statement detailing the reasons surrounding your senior year performance.
Joe, please understand that your admission to T.C.U. is in jeopardy. If I do not hear from you by the above date, I will assume you are no longer interested in T.C.U. and will begin the process of rescinding your admission.
Please realize that your personal and academic successes are very important to us. I look forward to hearing from you.
Raymond A. Brown