This is a typical type of USDT withdrawal failure.
Please proceed by referring to the information below.
1. ‘The request has expired.’ or ‘The validity time has exceeded.’ If the error message is confirmed
・ Authentication must be completed within 3 minutes after receiving the 2-channel authentication message.
> If you do not receive a Naver authentication notification
> When KakaoTalk authentication message is not received
> When the Hana authentication message does not arrive
2. In case of discrepancy in real name and information
K-Bank real name verification deposit/withdrawal account, 2-channel certificate, and member information (name, date of birth, mobile phone number) registered on Upbit must all match for withdrawal to proceed after 2-channel verification.
Please refer to the path confirmed in the link below and check whether the information registered in each matches the information registered in Upbit and K Bank.
If there is a discrepancy, please change all information to match and attempt withdrawal after completing 2-channel authentication.
> Path to check the member’s real name and information registered in the Naver certificate
> Path to check the member’s real name and information registered in the Kakao certificate
> Path to check the real name and information of the member registered with Hana Certificate
If USDT withdrawal fails even after referring to the solutions for each type, please contact customer service.