Universal Parks (and Disney) use fingerprint scanning, technically known as "Finger Geometry" verification, primarily to prevent ticket fraud and unauthorized reselling. When you first use your ticket, the system scans your finger and converts the unique measurements of your print into a numerical code (a "hash") that is linked to your ticket. No actual image of your fingerprint is stored in a database. On subsequent entries, the system re-scans your finger to ensure the numerical code matches the one on the ticket. This ensures that a multi-day pass cannot be used by one person on Monday and then "sold" to a different person on Tuesday. In 2026, this biometric system also allows for faster re-entry and "park hopping" without the need for manual ID checks. If you have privacy concerns, most parks allow you to "opt-out" by visiting Guest Services, though you will then be required to show a valid photo ID every time you enter the park.