In order to get free .com.np domain you have to write an application to Mercantile Communication Private Limited with a cover letter and attached copy of your citizenship. Find the sample cover letter below
To The Host Master,
Mercantile Communication Private Limited.
Ref: Register domain name
Dear Sir/ MadamI would like to register my domain name. I have
filled all the details as asked in the online form. I have attached
copy of my citizenship with this application.I will be happy if you
register my domain name as soon as possible.
Thank you for considering my application.
Domain Name: www.[yourname].com.np
DNS Details: ns1.namecheaphosting.com , ns2.namecheaphosting.com