What security feature helps protect personal information on the passport card?

The presence of invisible personal information is a crucial security feature designed to protect sensitive data on passport cards. This information is typically embedded in a way that it is not easily visible to the naked eye, making it difficult for counterfeiters or unauthorized personnel to access or replicate. This method adds a layer of security because it can only be found with specialized equipment, such as UV light or specific scanning devices used by border control officials.

This approach helps ensure the authenticity of the passport card while simultaneously securing the confidential elements of the holder's identity, such as full name, nationality, and other identifying details. Such measures are essential in maintaining the integrity of the passport card system and preventing identity theft or fraud.