So when you know preliminary, that bounties require the passage of the KYC, this is one conversation. You have been warned, you yourself decide to give documents or not to take part at all. But it's quite another matter when you take part, but about KYC you are told only when it's time to pay.
Yes, this is the meanest thing that can happen. Ask to pass KYC after performing the work provided that it was not stipulated in the conditions. It turns out that this is a fraud. But no one will definitely answer for it. 