need help about obtaining CNCC in singapore

  1. greetings everyone!

    me and my wife we're able to work in singapore for two years and now are in packet 3 for our immigration to the US, we have already forwarded the necessary requirements and payments to the singpore police dept. BUt they responded that we did not enclose in our application a documentary proof from a US immig.dept/authority to substantiate the need for a CNCC (certificate of no criminal conviction). I'm not sure of what documentary proof they require Is it the USCIS approval ?or is there any specific document from the US immig. for the said application of CNCC. i'm quite confused hope someone can clarify things for both of us. thanks...
    •  

close