QUOTE(ALES @ Feb 23 2008, 07:58 AM)

I am actually doing cr1/ir1. So i guess I will send the original and put big red color sticker saying" DON'T YOU DARE LOSING THIS ORIGINAL!!"

Joking....
Thanks guys, such a nice community.
Take care
Hi Ales,
I think it was confusing because your information says you are applying for a K3, not a CR1.
Anyway, yes, as has already been stated you do need to send the originals. You should get all the originals back - except - the police certificates, the consulate will keep these.
My Husband had his interview in Montreal last Tuesday, we sent three original documents to NVC, besides the police certificates - his birth certificate, our marriage certificate and my divorce certificate.
They only one returned at the interview was his birth certificate. The CO said at the interview the documents would be returned with the visa mail out. We received that yesterday - no documents returned.
Now, we do have the 'brown envelope' which contains all the info/documents the he will present at the border when we move to the U.S., whether they will return the other two at that time or not, I don't know (but I doubt it).
NVC now requires that you send a photo copy along with each original - MAYBE this means they will return the originals.
Anyway, what I am trying to say is don't count on getting them back at the interview and occasionally NVC does lose documents, as someone already mentioned, you might want to order a copy for yourself while you are getting them (like the police certificates for example, if you are really concerned about it).