I am applying for PR status along with my wife from USA. I read couple of discussions here about obtaining police certificates. As per the rules of Buffalo consulate, I am going to provide police certificates from Federal, State and my native country during my submission of PR application. What I am wondering here is that police certificates are valid for only 6 months, and by the time I will be called for interview or medical( appro. more than 1 year), shall I be asked to provide new police certificates again during interview??? What's best to get & provide them now along with my application or to present the latest ones during my interview time????