In reality, I don’t think that is how it will play out. I suspect the exchange will freeze BSV accounts under its control and simply take the coins it needs to settle and replace with a worthless IOU They did exactly that in the past, these exchanges are unregulated bucket shops. I would not trust them. Never keep coins in an exchange account. Keep them secure in a wallet where they can’t be taken. Read this, https://medium.com/faast/the-bitfinex-tether-scandal-shows-why-you-need-to-keep-your-funds-in-your-own-wallet-f19c7b66faab