Do You Have an Emotional Support Animal (ESA)

Susan, thank you for all of the good information about registering a pet as an ESA animal ! I don't have any problem with my landlord, but I definitely would want something like this, if for some reason I was traveling and needed to take Chipper along. I wonder if they let you take ESA animals on a train or bus, since neither of those allow pets at all ?
Do you have to take paperwork along with you so that you can show someone to prove that this animal is a registered ESA animal ? I think that this information is great for older people like I am to know, since many of the senior citizens really depend on our little pets for companionship.