I have a fake denarius with a great provenance. ex Heritage, ex Pegasi Coins, identified as a fake by Forvm along with an identical match in their fake coin reports.
https://coins.ha.com/itm/ancients/r...us-55-bc-ar-denarius-291-gm-/a/231433-62084.s When the coin arrived it contained the ticket from the prior Pegasi sale.