For the majority of visitors in 2026, you do not need to bring a birth certificate to Disney. Disney operates on an "honor system" for children under the age of 3, who are allowed free entry. Cast Members at the gate will typically just ask the child their age or take the parent's word for it. However, if your child is exceptionally tall for their age and is nearing the 3-year-old cutoff, having a digital photo of their birth certificate on your phone can serve as a "peace of mind" backup. In 2026, Disney’s "MagicBand+" and ticket linking systems are very sophisticated; once a child has an assigned ticket (ages 3+), their age is already stored in the system, so no further proof is needed. The only 2026 scenario where a physical or official ID is required is for Florida Resident discounts, where the adult must provide proof of residency. For the child, simply having their ticket linked to your "My Disney Experience" account is the standard operational procedure for entry.