Originally Posted by aerospace
According to celebritys website you are not required to provide documentation that your animal is a service animal but it is suggested. They do have some requirements such as letting them know 30days prior to sailing and have to be supervised 24/7, never allowed in stateroom unattended and on leash in public areas.
Since the cruise lines pretty much follow the ADA, they are not allowed under the law to ask for documentation. Hotels, restaurants, etc are also not allowed to ask...That's the law...