How do you know that? I tried to get find some history of internal transfer on SwC site and couldn't. I can only see a history of deposits from my wallet.
If you open your cashier, then go over to history and click it, on the top left you will see a menu that you can click. That menu shows deposits, withdraws, transfers, etc. Click transfers and you'll see the history of transfers to your account or out of your account. If you click the info button on the right of a transfer it will show you who sent you chips or who you sent chips to.