Therapy Dogs are not Assistance or Service Dogs. Therapy Dogs are pet dogs with special training and of the proper temperament to work with their owner around and for other people.
Most national organizations register their teams but do not certify them. A registered team may or may not have gone through training with a specific organization. The registration of the team in most cases means that the team signed up, paid a testing fee along with submitting an application, and went for an evaluation. If they passed their evaluation (test) with a set minimum score they then were eligible to be registered with that organization.
When a team is *certified* that implies that the organization requires certain training (classes through them) over a recognized length of time, normally has additional requirements like a minimum number of supervised visits, and possibly several different tests. This particular organization then certifies that the team has met their standards. There are fewer organizatins that certify as it requires a more indepth relationship between the team and the organization. Certifying organizations normally also monitor the team to make sure they are complying with their regulations and in some cases also mentor and do additional training with their teams.
National Therapy Organizations:
Therapy Dog International (TDI) - Registered http://tdi-dog.org/
Therapy Dogs, Inc.- Registered http://therapydogs.com/
Delta Society – Registered http://www.deltasociety.org/