I've just received my SETV from my home country (UK) But in the application I only provided my one way ticket to Thailand, I obviously have a onward flight out of Thailand incase they ask for it upon arrival at immigration, hope this helps.
would you be able share with me which order they put your name on the visa approval Cert? I applied for mine in November an recieved the approval but it seems they put my name in the wrong order, I did email them right away to make sure it was OK but I haven't had a reply and i fly out on 31st, so i was a little worried incase they don't accept it at immigration on arrival.