My landlord informed me that DHS persons came to my apartment. Me and my wife were out to work. Last year in May we applied for trivalley , we received the I20 from them but i never applied for COS. I am currently on H1B and iam not related to Tri valley anyway different from explained above. They dint left any call back number and iam not sure why did they came to my apartment. Can some one please let me know how to deal with this.