I just got a similar RFE for the offer letter. I have a tenure track position. My problem is that my offer letter is funny the same way biglentil pointed but.
My offer letter begins:
"I am pleased to offer you a full-time, tenure-track position as an Assistant Professor in the XXX
Department, within the College of XXX, for the Fall, Winter and Spring Quarters of the 2008-2009 academic year and for
the Fall, Winter, and Spring Quarters of the 2009-2010 academic year beginning September 15, 2008 and ending on June 12,
2010."
It does have an end date in the offer letter. Any ideas?