If you send tokens to the wrong chain, for example, sending USDC on Ethereum to a Polygon address, you can recover your funds by importing your Polygon private keys into Metamask. 

You can find your Nash private keys here: https://app.nash.io/settings/accounts

How to import your private keys into Metamask

1. Click on the circle logo
   
   
2. Click on Import Account
   
   
3. > Enter your private key
   > Click on Import
   
   

How to add a new network

After importing your private key, you may need to add the network which holds the token since Metamask doesn’t support all networks by default.

1. Click on Ethereum mainnet
   
   
2. Click on Add Network
   
   
3. Enter the credentials below for the Network you wish to add:

Avalanche:

Network Name: Avalanche
New RPC URL: https://api.avax.network/ext/bc/C/rpc
ChainID: 43114
Symbol: AVAX
Explorer: https://snowtrace.io/

Binance Smart Chain (BSC):

Network Name: Smart Chain
New RPC URL: https://bsc-dataseed.binance.org/
ChainID: 56
Symbol: BNB
Block Explorer URL: https://bscscan.com

Polygon:

Network Name: Polygon
New RPC URL: https://polygon-rpc.com/
ChainID: 137
Symbol: MATIC
Block Explorer URL: https://polygonscan.com

Then click on Save