I think this is common practise, especially at International Schools. I was teaching at Aloha College in Puerto Banus Spain. The board, who consisted of rich parents, had decided to bring in a Drama teacher who was a big friend of one of them, as usual elligidly she had no PGCE or B. Ed and so was not a trained teacher. I was given schemes of work, she had written to teach from when the ofsted team came in. I commented that they didn´t reach the criterea layed out for Drama at key stage 3, and so if she wanted me to teach from them I would let the ofsted team know that they were written by her. She was very annoyed when I said this and I was fired that summer!