This is great, 2500 posts & it's still not sure what's going on.
At this point I'd say the blame falls:
60% on Ottawa - didn't send the entire contract, possibly misled Vegas on the trade call*
30% on Vegas - in the 8 months that he was there they didn't bother reviewing a multi million dollar contract & notice that an addendum was missing
10% on the NHL - don't have a procedure in place to have all NTC, NMC, etc sent to the league (sealed & only opened when that player is involved in a trade)
/*there is a theory floating around that on the OTT/VGK trade call that Ottawa said that Vegas didn't need to worry about the NTC 'because Vegas wasn't on the list' and not that there was no valid NTC. Technically correct but easily open to misinterpretation as we've all seen - but that doesn't absolve them from forwarding on that information with the rest of the contract
At this point I'd say the blame falls:
60% on Ottawa - didn't send the entire contract, possibly misled Vegas on the trade call*
30% on Vegas - in the 8 months that he was there they didn't bother reviewing a multi million dollar contract & notice that an addendum was missing
10% on the NHL - don't have a procedure in place to have all NTC, NMC, etc sent to the league (sealed & only opened when that player is involved in a trade)
/*there is a theory floating around that on the OTT/VGK trade call that Ottawa said that Vegas didn't need to worry about the NTC 'because Vegas wasn't on the list' and not that there was no valid NTC. Technically correct but easily open to misinterpretation as we've all seen - but that doesn't absolve them from forwarding on that information with the rest of the contract