unauthorized

1. ADJ If something is unauthorized, it has been produced or is happening without official permission. 未經授權的; 未經許可的

...a new unauthorized biography of the Russian president. …一本新的未經授權的俄羅斯縂統傳記。

It has also been made quite clear that the trip was unauthorized. 這次旅行是未經過批準的，這一點也已經非常清楚了。