Where can I submit documents pertaining to my case?

You are to hand in original documents (i.e. passport, ID) in person at your local police station. You can also send them in by post to:
National Police Immigration Service (NPIS)
Postboks 2095 Vika
0125 Oslo

On a piece of paper, write your name, address and DUF number, and enclose it separately in an envelope with your other documents.

Do not send originals to UDI. You may send copies of documentation to UDI in an envelope addressed to:
Postboks 2098 Vika
NO-0125 Oslo

Enclose a separate piece of paper with your name and DUF number.