What documentation can airlines request for service animals?

Airlines can request documentation regarding a service animal's training because the Air Carrier Access Act allows service animals to aid individuals with disabilities during travel. Specifically, airlines may require proof that the animal has been trained to perform tasks directly related to the person’s disability. This is important to ensure that the animal is appropriately equipped to provide the necessary assistance, which upholds the intent of the Act to guarantee access for individuals with disabilities.

While vaccination records and other forms of documentation may be relevant in other contexts (such as pet travel), they are not specifically required under the Air Carrier Access Act for service animals. The Act focuses on the animal's training and capability to assist individuals with disabilities, making the proof of training the most relevant and necessary document for airlines to request for service animals.