I think it depends on Nepal immigration person. Immigration ko manche sabai ghuusss khori chan. Ghuuss khana lai NO obj. letter mag na ni sak cha. Ma usti Nepal gaye ra aaye ko. mero I-20 ma initial attendance thiyo tara malai NOL ma ge na. Sayad tesle pahila nepal bata departure bhaye ko ra arrival ko sticker passport ma  dekhera na mag ge ko hola. tini haru lai paisa khuwanu bhanda baru NOL banaye kai ramro hola. At least NOL banaye ko paisa desh ko income ta huncha, haina ra?