Hello. In May 2007, I accepted an offer of employment from a company hq in Illinois. I started working for them in Sep 2007 in California. One of the terms of the offer was a onetime bonus that I’d have to repay in part if I quit or were to be fired with or without cause within a year of joining. I was fired in June 2008. At the time of termination, no reference was made to any repayment due from me for the prorated sign on bonus. In Jan 2011, I received a letter from their internal collections department asking me to repay the prorated sign on bonus. Is the request valid since more than 2 years have passed since termination? Do I have to pay them?