He informed his superiors of the decision, and they concurred.
Neither of them had informed their superiors or colleagues that he used the other as a source.
You've done what you could and you've informed your superiors.
"We have a duty to inform our superiors," said Frost.
Perhaps I need not inform our superiors at all.
He did not inform his superiors about the typhus epidemic until the news of the situation was reported by the local newspapers.
Then, as now, he had promptly informed his superiors of the situation.
So the night before some 8,000 departed, he informed his superiors that he would stay.
He said he informed his superiors of each incident, but never discovered who was responsible.
She took the money without informing her superiors at Fidelity.