Which item is NOT necessary for a secondary ID?

In the context of secondary identification, a photo of the person is not a mandatory requirement. Secondary IDs are often used to supplement primary IDs, which typically contain a photo. However, secondary IDs can be effective even if they do not include a photograph, as they can still serve the purpose of verifying identity through other means.

On the other hand, government-issued identification, a unique identifier number, and a date of birth are generally important components of a secondary ID. These elements help to establish a person's identity more robustly by linking them to official records and providing essential verification details. In many situations, identity verification processes prioritize documents that can prove an individual’s identity through these attributes rather than solely relying on a visual representation.