unauthorized

1. ADJ If something is unauthorized, it has been produced or is happening without official permission. 未经授权的; 未经许可的

...a new unauthorized biography of the Russian president. …一本新的未经授权的俄罗斯总统传记。

It has also been made quite clear that the trip was unauthorized. 这次旅行是未经过批准的，这一点也已经非常清楚了。