Yes, its a bit rude requiring victims to provide KYC when it wasn't required when they were customers. This is probably not even required by law, just the liquidators being overly cautious.
In the #cryptoclassaction I'll be arguing strongly that compensation should be paid directly and automatically to affected crypto wallets without KYC or even registration.
People who have suffered a crime should not have to lose their privacy to be compensated.
By having compensation directed by Court orders KYC can be avoided as KYC laws don't apply to Courts or lawyers following Court orders.