As you may be aware, the credit reporting bureau Equifax recently experienced a data breach that exposed sensitive personal information for a large number of people. While this breach does not directly impact your securities investment accounts, you may wish to review information about the breach on the Federal Trade Commission site, here: https://www.consumer.ftc.gov/blog/2017/09/equifax-data-breach-what-do. This site describes the incident and your options for further action.
Equifax & Identity Affirmation by Cambridge