If you've forgotten your Citi card PIN, call our toll-free helpline at 1-888-388-4751 for assistance. You can also retrieve or reset it by logging into your Citibank online account or mobile app. Go to the account settings or security section and find the option to manage your PIN. Follow the instructions to verify your identity and reset your PIN. For immediate help, contact Citibank's password reset service at 1-888-388-4751 to securely reset your PIN and regain access to your account.