When you enter a CHI number, the system checks if it meets the requirements and matches the database. If the number's format is incorrect, the system displays an error message ‘The CHI number is invalid Chi numbers should be 10 digits long. Hint First 6 digits will be DOB’ - ‘The CHI number doesn’t work’.
Please verify the details carefully. If further clarification is required, utilise an internal CHI number checker, if available.