The phrase "alert him of" is correct and usable in written English.
You would use this phrase when you want to give someone a warning or to make them aware of something. For example: "The fire alarm went off, so I alerted him of the situation."
A few days before the commission formally opened its case against Google, Mr. Almunia telephoned David C. Drummond, the company's chief lawyer, to alert him of the investigation.
Increasingly, friends and fans will contact him to alert him of shots on the hill that he's missing: "Oh my God, there's something happening.
Mr. Rumsfeld gave the order to attack, and called President Bush to alert him of the developments, a military official said.
At times, James referred to himself in the third person and was criticized for not having the courtesy of calling the Cavaliers owner Dan Gilbert beforehand to alert him of his decision.
Federal law prohibits the selling of organs but not of human tissue.Although Mr Guyett got his bodies from funeral homes (he paid the directors to alert him of new arrivals), more reputable tissue businesses get their bodies from hospitals, which tend to keep better records and have better preservation facilities.
I then contacted "20/20's" producer, Mark Golden, to alert him of this problem, and he simply told me that he promised to "consult" with Professor Ennis, but he was not obligated to do what she (or I) wanted.
It took an avalanche of bad press to alert him to the idiocy of his remarks.
At his compound in Hawaii, he had developed a network of informers who would alert him to the presence of anyone in the area not authorized to be there.
His marriage to an artist, Ms. Zimmerman, had helped alert him to the value of including the views of living artists at the museum.
Mr. Furmark confirmed in the Canadian network interview that he had telephoned William J. Casey, the Director of Central Intelligence, on Oct. 7 to alert him to the dissatisfaction of the Canadians over their failure to recoup their money.
There were rumours, denied by the ECB, that England coach Duncan Fletcher had approached match referee Mike Proctor to alert him to the condition of the ball on the Saturday evening of the Test.
