I received an automated call from Alliant about questionable activity on my account. Is this legit? Yes, this automated call is valid. We partner with a third-party services provider that monitors for potential fraud activity on all Alliant members’ accounts. If you received an automated call, please contact us at 800-328-1935 at your earliest convenience. If you are outside the U.S., please contact us at 773-462-2000. Learn more about the security measures we take on your behalf.