Talk:Kunai/@comment-138.163.0.43-20130805104910/@comment-4613046-20130805131459

Correct, in fact if you give any of the venders idol forgeries then you'll be voided null for all corresponding rewards.

Taken from the Supplier's Demand page: This applies to all idols, and is not limited to only the Gold Idol.
 * Giving her a forged idol has negative, if potentially amusing, consequences.