You need police report form all countries where you been for more than 6 monthes including Nepal. If you want get police report from Nepal, first you need to send scanned copy of your passport, first two pages, copy of both pages of nagrikta and stamped page when you exit Neapal. If your dad or mom live in Nepal, they can take their nagarikta with them. They just have to prove you are their relative(son). Then either in gausala or ratanapark you can get your police report.

Hopefully this will help you

Nepali Toronto