The phrase "a final request" is correct and usable in written English.
It can be used when someone is making a last appeal or asking for something one last time, often in a serious or emotional context.
Example: "Before we part ways, I have a final request: please take care of yourself."
Alternatives: "a last plea" or "a concluding request."
He had emailed a friend with a final request: Take care of Sampson, the dog seen in the viral video.
Judge Linda Baxter last week turned down a final request to move the trial of Rabbi Fred J. Neulander out of Camden, and it is now scheduled to start tomorrow in Superior Court there.
But as he closed the interview, O'Reilly — still seemingly surprised by Trump's sour mood — made a final request: "If I'm being unfair, you come on and tell me; you give it to me, man". It sure looked like Trump's coldness bothered O'Reilly more than anything else — like he could deal with the candidate's anger but hated the thought that Trump might not even come on his show to express it.
He allows a final request, however, and Bart asks to hear Bob sing the entire score of H.M.S. Pinafore.
Meanwhile, Dean also this week issued a statement with "a final request that goes out to all of the media.
He also pleaded on behalf of his family, that they should not pay for his actions, before making a final request to be beheaded.
Five more steps were outlined, and an ambitious final request was made: that Khashoggi and Zuhair arrange a meeting with Prince Nawaf Abdul Aziz, the Saudi intelligence chief, "so that we can assist in Washington".
A fourth mailing included the final request and a second copy of the instrument.
One Final Request A lot of hard work and patience and tears and sexual compromise went into making this a Wonderful Celebration of Love.
The Air Force has not set a deadline for submitting its final request for proposals, but industry executives expect that a decision will likely be made by the end of January or early February.
One final request: an elevator for my great-uncle Lyle.
