My current company "A" is using a missing piece of information from my employment application as a ground for termination after my employment with them for 9 months. I feel that this information was not significant and was a non-deliberate omission on my part. The omission was that during my past employment with them 13 years ago (which lasted 5 days as I was recruited back by my ex-employee) they had served me with an injunction to hold confidential any knowledge/IP I had gained during those five days. Later this same knowledge/IP was trasferred from company A to company B by acquisition. I had completely forgotten about this thing as it was not consequential later. Can company A use this technicality which seems to be trivial to me as a ground for termination?