As an early Casascius buyer/holder I viewed these coins as nice memorabilia items and didnt think of getting Chain of custody for future authentication.
Obviously with the high value these coins have now it's becoming something both seller and buyer want assurance on.
So if a seller doesnt have chain of custody would the next best solution be to have the coins in question checked by trusted experts? Eg: Hologram, coin pressing, ink used etc.
Suggestions for other methods to authenticate?
There are a few members here that I would call on to authenticate any Casascius coins.
And yes... all those: hologram, coin pressing, ink, printing, etc