I have a few questions on this topic, I have been doing some research on ESA, and I know I need a written letter or statement by my psychiatrist (which I have a appointment with her, and I'm sure she wouldn't have a problem with it because of my background). Is this true?
The letter is good for up to one year and is needed when requesting to keep your dog with you in "no-pet" housing or to fly in cabin with you on a commercial flight. These are the only times you will receive additional benefits in calling your dog an Emotional Support Animal (ESA).
There are no specific requirements in training other than the dog behave and acts mannerly in public and does not show any type of aggression. They help their owner just by their presence. THIS is a main difference between an ESA and a Service Dog.
ESA's are not required
any special training to mitigate their owner's disability.
Service Dogs are required
to be trained tasks to mitigate
their owner's legal disability.
As to Medical Alert Dog
-- that is just a more broken down term under the heading "Service Dog" that some groups or individuals use. It is not a regulation or legal need to break down Service Dog into various subgroupings.
Third, how do I go about registering or certifying him?
There are no federal registration or certifying agencies in the U.S. If you go through a business or organization for any of the training of your dog most will give the individual handler some type of certificate or letter of completion that you can then frame and hang on your wall or put into a scrapbook or training manual if you wish. An individual then could say something like their dog was given a Certificate of Completion for Basic Obedience from the Acme Dog Training School if they wished. Some organizations will also compile a record of those dogs who have completed certain of their criteria and so the dog is now registered with their organization as doing such. In other words this particular organization has the dog "registered" within that organization.
For ESA, all I have to do is get my doctor to prescribe it, and just by a I.D. for him?
Where can I get some decent harnesses, and I.D. at a good price?
You are not required to buy any additional or specific ID for your dog stating that he is an ESA. It is usually only a one time thing to show your landlord the original letter and they will normally require a copy for their records. As to flying your dog with you on a commercial flight you will need the letter from your doctor for each flight that you make. The letter will need to be less than one year old, on letterhead, and signed by your mental health care provider. You will need to notify the airline in advance that you will be bringing your ESA with you so that they can then verify any info that you give them. Even with that advanced notification you will still need to carry that letter and a very recent health certificate signed off from your dog's vet.
I just noticed that I did not address the harness part of the question. There are no requirements to put a harness on an ESA nor any other special type of equipment. Use a collar or harness according to the needs or your particular dog based on their comfort and your ability to use this equipment. Sometimes a dog will need to use a harness based on their own particular medical issues. Some handlers just prefer using a harness vrs. a collar.
Even a Service Dog is not legally required to wear a harness or any other specific type of equipment. Some do wear harnesses, such as a Guide Dog or a Mobility Service Dog, because in their cases a harness is needed by their handler.