Authenticity is real. It is a repair process within the order of symbols, within the hyperreal, in which efforts to destroy the order of symbols are channeled into acts that strengthen and expand it.
In its new role as money, it is stored in climate-controlled warehouses rather than displayed on walls. As art became money, the institutions that supplied it developed rituals for establishing its money-like properties: alienability, authenticity.
Are whatever being really passive, or just a bit slippery? Why is passivity a bad thing anyway? Maybe there was always something a bit backward looking about Lacan.