>This check is guaranteed to detect any instances where a single character has been omitted, duplicated, mistyped or where two characters have been transposed.

>This check is guaranteed to detect any instances where a single character has been omitted, duplicated, mistyped or where two characters have been transposed. https://en.wikipedia.org/wiki/International_Bank_Account_Number#Check_digits https://en.wikipedia.org/wiki/International_Bank_Account_Num...