I don't want to sidetrack this thread but I did look at the first site and they did describe a therapy dog much the same as I did. Perhaps you are confused on the certified part, hospitals, nursing homes , ect can I guess allow any dog to come in and call it a therapy dog themselves but most places require the dog to be certified and insured.
I did see where that site will apparently sell you a certificate for service, support, and therapy dogs without any proof that the dog was trained for such duty. Like the online Diplomas that are sold
, guess if you can find someone that accepts them as real then they will work.
Most places I worked with in the past had a list of the pet therapy organizations that they accepted and I would never take my pet into such a place without having him insured. And you are not going to get him insured unless you have him trained and certified by a reputable organization.
It be interesting to know if anyone that has purchased one of these certificates actually got an airline to accept it.