No, Disney theme park tickets are not shareable or transferable once they have been used for the first time. According to the official Disney World and Disneyland policies, once a person uses a multi-day ticket to enter a park, that ticket is linked specifically to that individual's biometrics (fingerprint) or photo, and all subsequent days on that ticket must be used by the same person. Attempting to share a used ticket is a violation of Disney's terms and can result in the ticket being voided without a refund. However, if a ticket is completely unused, you can reassign it to another person in your "Family & Friends" list via the My Disney Experience app or website. For runDisney events, the rules are even stricter: bibs are non-transferable between individuals under any circumstances. Once the "first tap" occurs at the park gates, that ticket belongs to that guest exclusively until it expires.