First, you need to log in to your mobile banking account and check the deposit history for a deposit of 1 KRW.
The depositor name of the 1 KRW will appear as S**** (* stands for the 4-digit code).
Enter the 4 digits you see after S on the blank to complete the penny test verification.
If you do not have a mobile banking account, you can use a nearby ATM (automated teller machine) to check your deposit history for the 4-digit code.