Think of the NFC chip access code like unlocking a bank card with a PIN. Just as you need to enter a PIN to use a debit card, the Passport’s NFC chip requires a special access key—printed as a Machine Readable Zone (MRZ) or Card Access Number (CAN).This prevents unauthorised scanning of Passport by ensuring that only someone who physically sees the document can access its NFC chip. Without this code, the chip remains locked and unreadable, just like a bank card without its PIN.