Our fraud prevention and security systems help protect you with a combination of firewall barriers, encryption techniques and authentication procedures to maintain the security of your online session and to protect your accounts. We will NEVER request your account number, debit card number, social security number, PIN or password through email, text or phone call. If you receive an unsolicited call or email claiming to be from Landmark, DO NOT respond. If you notice any suspicious or unauthorized account activity, or believe your personal information, login credentials or computer security have been compromised, please contact us immediately at 1-800-318-8997. For more information on our security measures, please read our Security Statement .