What type of sensitive data must not be included in court documents?

When discussing sensitive data that should be protected in court documents, it's essential to understand the nature and purpose of the information involved. Including only the last four digits of Social Security Numbers in court documents is a practice that aims to strike a balance between identification needs and privacy concerns. By using just the last four digits, it provides a level of anonymity while still allowing for necessary identification.

Full Social Security Numbers, on the other hand, are considered highly sensitive information as they can lead to identity theft and other privacy invasions if they are publicly available. Similarly, all financial account numbers are sensitive and should be protected to prevent unauthorized access and fraud. Legal guidelines and practices are in place to ensure that while courts can operate effectively, the privacy of individuals' sensitive data remains a priority. Therefore, the approach of only including the last four digits is consistent with these privacy protection efforts, making it the appropriate choice among the options presented.