Thanks very much. I got my notarized copy of no-criminal record right before I came to US (and never went back since then). I got a reference letter from school (jie4shao4xin4 saying that my record is clean) then i brought it to the notary office and they gave me the notarized copy. I didn't go through this with any security/police offices. So this is still fine? Just want to double check.