# OTC Service
OTС (Over-the-Counter) service is designed for Waves.Exchange premium users to exchange USDT to USDN (and vice versa). The service works via the smart contract (opens new window) and allows to exchange the amounts over 10k at 1:1 rate at any time. Please note that the service implies OTС fee.
You can access OTC service by navigating to Buy Crypto > OTC (opens new window) tab.
Or you can access OTC service from USDN staking (opens new window) page.
# Exchange USDT to USDN
On the OTC Service page open USDT to USDN tab.
This tab allows to exchange USDT to USDN. On this tab you can also find the address to send USDT assets to your Waves.Exchange wallet from external sources.
Note: Waves.Exchange OTC service allows to exchange not less than 10,000 USDT to USDN at a time. If you don't have enough USDT on you Waves.Exchange wallet balance, use the address provided on this tab to send USDT to your Waves.Exchange wallet.
Enter the amount of USDT that you want to exchange to USDN in the I send field.
Select the Transaction Fee Options checkbox to specify the asset that you want to use to pay the transaction fee.
Click Exchange to USDN via Smart Contract to continue.
You can review the status of your transactions on the Wallet > Transactions (opens new window) tab. Read more about Transactions tab.
# Exchange USDN to USDT
On the OTC Service page open USDN to USDT tab.
This tab allows to exchange USDN to USDT.
Note: Waves.Exchange OTC service allows to exchange not less than 10,000 USDN to USDT at a time. The total exchange amount can not be more than the amount that you have previously exchanged to USDN with Waves.Exchange OTC.
Enter the amount of USDN that you want to exchange to USDT in the I send field.
Select the Transaction Fee Options checkbox to specify the asset that you want to use to pay the transaction fee.
Click Exchange to USDT via Smart Contract to continue.
To avoid market destabilization your USDT will be locked on the smart contract for 1460 blocks (~24 hours). You will be able to track your exchange operations status on the OTC service page. Once your USDT are unlocked, you will be able to get the assets by clicking Get USDT.
You can review the status of your transactions on the Wallet > Transactions (opens new window) tab. Read more about Transactions tab.
See more articles in the Asset Management chapter.
If you have difficulties with Waves.Exchange, please create a support (opens new window) ticket or write a question on our forum (opens new window).