pn is not cash it is way of investment in any market without involving directly .and no way this money can go to any extremist orgnisation .it work like suppose u are frm usa and u wannna to invest in tata steel but ur not registered with sebi then u can invest through pn by indirect way coz in this case ur not require to take any permission ur investing in some us cfinancial compny which will issue pn on the basis of ur investment . so i hope now ur doubt is clear.
