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So, I believe the main responsibility falls on the exchange. They need to make sure they thoroughly verify the information provided, cross-check the documents, and only approve KYC for accounts once they're sure everything checks out. Once an account is verified, it's no longer the exchange's responsibility. If there's an investigation, the exchange might cooperate with the authorities. So, if you're using P2P and funds from the other party come from illegal sources, you should be in the clear unless you're in colluding with them.
It must be because they manage the platform.
But to be investigated in detail by the exchange itself and the authorities to freeze funds in the account, there must be a large enough transaction.
If the transaction is under $100, it probably won't get any response and will be a less complicated internal resolution.
And it also depends on how many people report fraud on the same suspect.
That depends on exchange again, platform I was scammed on was local p2p exchange, they couldn't do much about it and eventually shrugged off. I dunno how much and what data binance p2p asks.
Local exchanges will usually be more concerned about fraud.
At my local exchange, there was a hack on an account used by a customer, but it didn't get a serious response initially,
but when it was brought up to the media they did investigate, and the hacker was caught.
The point is that local p2p will usually respond more quickly if there is a lot of pressure so that the case will be investigated.