The Bank of Korea exchanges any damaged, mutilated or contaminated currency of the Bank of Korea with new currency at the face value providing there are sufficient fragments or remains.
The Mutilated banknote may be exchanged
At full face value : if more than three-fourths of the genuine note remains

At half face value : if less than three-fourths but more than two-fifths of the genuine note remains

At no face value : if less than two-fifths of the note remains

The Mutilated coin may be exchanged
- At face value : if it is unfit because of being distorted, rusted, or etc.
- At no face value : if it is out of recognition or has dubious authenticity