The FB thread(s) are now in overdrive... having read them and all the comments so far, I'm struggling to see how its a fake despite reading all the different scenarios being suggested.
There's no question that card can delaminate and could come in two separating front from back, but this is very rare (there are examples, such as Nick's Fett) where this has happened due to excessive moisture. Where I struggle is the idea that the two separate 'parent' items both came apart and were then able to be put back together as a new bastard child... The punch and edges are by all accounts seamless, thats a seriously lucky match, or some very clever trimming, that by all accounts has left no scalpel cut marks...
The risk also seems to great to be able to imagine that someone could have forcibly separated the card of two different rare items; even if you suggest that the Italian parent was a cardback only and not a MoC. The return is huge, no question, but a carded VCJ as a donor item is to me at least, a crazy notion.
I see that the two halves are considered to be different coloured card (one may of course have been affected by a repair (glue) at the edges rather than a fake creation I guess.
Either way, I'm not defending the item; I've never seen it first hand, I hope its a repair that has been missed if anything and not a fake, AFA are hardly known for being able to tell real from fake historically, so their opinion is not the be all and end all in the case as it stands. What is really concerning is that there is a possibility that this is a new level of fakery those at the high end of the hobby have to be wary of from now on...
I'm sure Vectis will come good on whatever their duty will be on it and hope that the buyer gets a resolution.