I believe service animal training is already accredited. The issue here is that businesses are in the habit of trusting the "Service Animal" labeling and not checking if it's genuine or someone's ESA.
0. Is this a dog or miniature horse? (only those animals are considered as potential service animals under ADA)
1. Is this a service dog within the definition of the ADA, i.e. has it been trained to perform a specific tasks to mitigate a disability? (cannot ask what the disability is)
2. What specific tasks is it trained to perform? (ex. seizure response, seeing eye, etc.)
However, there is no way for you to "check" if this is true. Service animals need not be trained by any approved company or carry any identification, and you cannot ask about this. The only way out is if someone admits to it not meeting the legal definition or gets caught in a lie while answering these questions.
If, after all that, the animal cannot be reasonably accommodated as it is not being housebroken, being vicious or harmful, damaging property, or making an unreasonable and excessive amount of noise, it can still get shown the door. Likewise, if allowing an animal is inappropriate under any circumstance for safety or regulatory reasons (ex. cleanroom, food service, nuclear exposure, hearing damage potential, etc), you need not allow it. The establishment owner is never responsible for feeding or looking after the dog or procuring one for the person with disabilities. You can expect that service animals be kept on lease unless brief exceptions are critical to job function.
https://nypost.com/2019/05/03/lawless-world-of-service-dogs-...
Even the federal government gets ripped off
>The legislation appeared to be a victory for service-dog advocates, but the study almost immediately encountered problems. The V.A. initially partnered with vendors whose poorly trained animals introduced unexpected complications. ... “We relied upon the organizations themselves, all of which professed to be very experienced and to be able to produce high-quality dogs, and unfortunately that did not turn out to be true,” Fallon told lawmakers in a 2016 congressional hearing. “We were not familiar enough with the service-dog community when we embarked on the pilot study. There’s no question that we’ve made mistakes
the ada explicitly doesn't allow any kind of request for documentation or certification either. basically you just have to take people at face value when you ask them if the animal is required because of a disability. and lots of people with ESAs are okay being very casual about that.
(and the reason i can figure out why people with ESAs are okay with bending the truth compared to a trained service animal, is because they tend to be the ones that are VERY upset in two situations that are legal: the one where i negotiate different accommodations because i'm very allergic to dog dander, and the one where they get upset that a misbehaving ESA is being asked to leave the premises. having been around dozens of trained service animals - i've never seen one misbehave the way ESAs can, and everyone is happy with my suggestions due to my allergy since i go above and beyond, rather than making things more difficult.)
https://www.ada.gov/regs2010/service_animal_qa.html
If someone does have some type of certification, I assume it’s they’re fraudulently claiming it’s a service animal.
Because they're afraid of lawsuits, or worse — being tarred and feathered on social media.
Yet another part of society that social media has made worse.