Hello guys, I have a big doubt. I'm staying in the UK and I just applied for the national insurance number in order to work here. I just got in the mail the application fom which I have to fill in and return to some address. But, also I have to attach this in the envelope: "Provide an original or certified copy of your passport or identity card". At first I was 100% sure i just had to make a photocopy of my passport and put in the envelope but asking some people they have all told me the same: You have to put in the envelope YOUR "physical" passport and send it with your application. I just wanted to confirm this with native english speakers. Do you have a difference between copy and photocopy then?.