A fork is when a specific blockchain splits, creating two versions of the same coin, one corresponding to the existing network and one to a new network. The new coin created is usually distributed to holders of the original coin in a 1:1 ratio, since the new network is effectively a clone of the old network with the same wallet addresses and private keys. This is what happened when the Ethereum project split into two chains in 2016: the original project (Ethereum Classic) and the new project (Ethereum).

Usually, you can use your private key from the original network to access your coins on the new network. If your coins are on a centralized exchange the exchange controls your private keys and can decide whether to unlock and distribute the new coins to you or not. Since Nash is non-custodial, we do not have possession of your private keys. You can extract your private keys and use them to unlock the tokens on the new chain.