The phrase "already informed about" is correct and usable in written English.
It can be used when indicating that someone has prior knowledge or awareness of a particular topic or situation.
Example: "I wanted to check if you are already informed about the changes in the schedule."
Alternatives: "previously notified of" or "already aware of".
Research carried out at Edinburgh University found that information contributed to increasing support for independence "when it meets a 'fertile soil'," such as those who are more politically active, are already informed about the referendum and are more emotionally involved in the issue of independence.
The flight crew was so kind and was already informed about his nut allergy.
The remaining two questions showed a high rate of correct responses before and after the video, indicating that the participants were already informed about these concepts.
Furthermore, the sequence of the clinical evaluation was not clearly defined and it is not evident if the investigator or patient was already informed about further test results or differential diagnoses.
Ask a someone you trust who is already informed about your situation, such as a parent or therapist, to practice the conversation with you.
As an industry leader, it's more than likely you're already heavily involved in -- and informed about -- the changes taking place in that arena.
Witnesses have already informed investigators about the attempt by Mr. Sullivan to postpone the internal audit, people involved in the case said.
Like The Fifth Estate, starring Benedict Cumberbatch as Julian Assange, The Program faced the challenge of a divisive protagonist, as well as a recently released hit documentary that had already informed audiences about many of the events depicted (We Steal Secrets: The Story of Wikileaks and The Armstrong Lie respectively).
Mr. Biggs already informed you about the Mako speakers from Razer, but I gleaned a few more details over the weekend from some THX folks thanks to Don Julio.
Your pen pal should have already informed you about top 10 clubs in the city.
The company said it launched an internal investigation into the use of the Macro and, based on the results, had already informed the California Department of Insurance about it.
