Can an airline ask for a medical certificate for a passenger with a disability?

Airlines are permitted to request documentation for a passenger with a disability, but this is only applicable in specific situations. Under the Air Carrier Access Act, airlines must accommodate passengers with disabilities, but they can ask for medical documentation if the passenger's condition is not apparent or if more information is needed to provide the necessary accommodations. This could mean presenting a medical certificate that certifies the need for specific assistance, such as the use of medical equipment or a service animal.

It's essential to note that limitations exist. Airlines cannot systematically require documentation from all passengers with disabilities or for every situation, which respects the rights of individuals who may not have visible disabilities. Thus, the nuance of the request being context-dependent is critical to understanding the correct answer.