Nev. Rev. Stat. § 462.310
Upon a trial for violation of any of the provisions of this chapter, it is not necessary to prove the existence of any lottery in which any lottery ticket purports to have been issued, nor to prove the actual signing of any such ticket or share, or pretended ticket or share of any pretended lottery, nor that any lottery ticket, share or interest was signed or issued by the authority of any manager, or of any person assuming to have authority as manager; but in all cases proof of the sale, furnishing, bartering or procuring of any ticket, share or interest therein, or of any instrument purporting to be a ticket, or part or share of any such ticket, constitutes evidence that such share or interest was signed and issued according to the purport thereof.
NRS 462.310