For almost 3 months since I got my dog, I have been scammed by a couple of companies online when I tried to get him certified as an ESA. Whatever website I made the purchase, all I received was a certificate and a dog leash. I almost gave up and thought of taking him to a pet shelter because my landlord wouldn't allow any pets. Someone told me about www.realesaletter.com and I gave it another shot for paying online. It came to me as a surprise when my landlord accepted the certification letter for housing. I would not only recommend this website for a legit documentation but also warn everyone about other websites which charge you money for some products than an actual Certification Letter.