I was reading everything to bring & have never been asked for a police certificate. Do I need this?

If you are older than 16 years of age: The original police certificate from your country of current
residence and countries of previous residence. If these three items are all true, you must bring a more recent
police certificate to the interview:
􀁯 He or she is older than 16 years;
􀁯 He or she obtained a police certificate and submitted it to NVC more than one year ago; and
􀁯 He or she still lives in the country that issued the police certificate.

It seems I do but where would I go to obtain this? I know we had one on my wife but never did the process ask for one on me.

Thanks for the help DR1!