US Nepali ji,

Here is what I did:

My Nepali nagarikta paper and a 'power of attorney' (adhikrit waresnama) remains in Nepal. When I acquired a non-Nepali citizenship, they took my Nepali passport only. When I go back, I can carry on being a Nepali for jagga-jamin purposes with my Nepali nagarikta. It was a day's work to do the same (transfer to someone else) at Dillibazar with some Rs5000 involved in paper pushing and wakil kharcha, besides the required malpot, if required.

Hope this helps

_x