Emotional Support Animal Letter?

Hi everyone — I’m looking for advice on getting a valid Emotional Support Animal (ESA) letter. I live in Utah and need the letter to give to my landlord so I can keep my dog in my apartment, which has a no-pets policy.

I know the letter needs to come from a licensed mental health professional and follow Fair Housing Act guidelines, but there are so many websites out there that it’s hard to tell what’s legit. My neighbor recommended RealESALetter.com and said she checked out other services but felt this one was the most reliable and legally valid.

Has anyone here used them? Or does anyone know what I should look for to make sure an ESA letter is legally accepted? I really want to do this the right way and avoid getting scammed.

Thanks in advance for any guidance!