Which action can lead to security infractions?

Failing to ensure receipt of classified documents can lead to security infractions because it creates vulnerabilities in the handling and accountability of sensitive information. When classified documents are circulated, it is crucial to verify that they are received by the intended parties to maintain a secure chain of custody. If a document's receipt is not confirmed, there is a risk that it may be mishandled, lost, or accessed by unauthorized individuals. This lack of accountability not only compromises the integrity of the sensitive information but also increases the potential for legal and operational consequences related to security breaches. Ensuring receipt is a fundamental part of safeguarding classified materials and adhering to security protocols, making this action particularly critical in maintaining overall information security within organizations.