Which of the following is an example of a security infraction?

The correct choice is that failing to double-check your SF-702 is indeed an example of a security infraction. The SF-702 is a security check sheet used to document the security of classified information and materials. It is essential to accurately complete and verify this form to ensure that physical security measures are upheld and that classified materials remain protected.

Neglecting to double-check the SF-702 can lead to significant security vulnerabilities, as the form plays a critical role in maintaining accountability and ensuring that classified items are secured properly. A failure in this process can jeopardize the integrity of national security, making this infraction a serious matter.

In the context of the other options, not classifying documents as required would constitute a failure to adhere to proper classification protocols but isn’t as explicit as failure in handling security documents like the SF-702. Creating documents without authorization is a more severe infraction that deals with the creation of sensitive material rather than a procedural mishap. Improperly downgrading classified information is also serious, but it typically refers to a misclassification rather than the procedural diligence necessary for maintaining security checks. Thus, the failure to double-check the SF-702 stands out as a clear procedural infraction related to operational security.