Understanding how to validate California IDs in the moment relies on looking for authentic, hard-to-forge features and matching the person to the card, rather than relying on the date alone. The expiration date can be legible and still the ID be counterfeit or stolen, and a valid-looking date doesn’t guarantee that the person presenting it is the rightful holder. Focus on cues that are designed to prove authenticity: the signature on the card should be present in ink and the overall signature area should be smooth, which helps spot tampering; the photo should resemble the patron, which ties the card to the person; and security features such as holograms indicate the ID was issued by the state and not counterfeit. Expiration dates are important for confirming the card isn’t expired, but they aren’t a strong stand-alone check for identity or authenticity, so they aren’t the primary procedure to rely on.