A large scale phishing scam is underway that pretends to be a security notice from Chase stating that fraudulent activity has been detected and caused the recipient’s account to be blocked. One recipient said they fell for the scam after their card was denied in a purchase online and thought the email was a legitimate Chase fraud alert. If you are a Chase customer and receive an email asking you to login or enter sensitive information, immediately delete the email and call customer service to confirm if they contacted you. It is important to remember that Chase fraud alerts never prompt you to enter any information or your login credentials.
Source: https://www.bleepingcomputer.com/news/security/psa-active-chase-phishing-scam-pretends-to-be-fraud-alerts/