Yes, as of recent policy updates, you may need an ID for Knott's Scary Farm depending on your age and the current Chaperone Policy. Knott’s Berry Farm implemented a policy requiring all guests aged 15 years old or younger to be accompanied by a chaperone who is at least 21 years old to be admitted to or remain in the park after a certain time (usually 4:00 PM). The chaperone must present a valid government-issued photo ID with a date of birth. While guests over 16 don't technically need an ID just to enter if they have a ticket, security reserves the right to ask for proof of age if a guest's age is in question regarding the chaperone rule. Additionally, if you are planning to purchase alcohol or use a credit card for large purchases, a valid ID is mandatory. Given the high-security environment of the "Scary Farm" event, carrying a form of identification is strongly recommended for all guests to avoid any entry delays, especially since the event has strict conduct rules and a "no re-entry" policy that is strictly enforced by park staff.