The phrase "a note acknowledging" is correct and usable in written English.
You can use it when referring to a written message that recognizes or confirms something, such as an event, receipt, or action.
Example: "I received a note acknowledging my application for the scholarship."
Alternatives: "a message recognizing" or "a letter confirming".
Mr. Buffett's Web site has been updated with a note acknowledging the fall, and adding: "The doctors say he is doing well and will be released tomorrow".
But just because a tactic works in cartoons doesn't mean it works: the flaw was clumsily planted, and spotted by the scientist almost instantly, spooking him so much — he was sure the Iranians would see it, too — that he attached a note acknowledging "practical questions" that he said could be fixed for money.
Andreessen wrote a note acknowledging his share of the prize on his blog, saying that he intends to donate his portion to charitable causes that help promote engineering.
Cliff Kurtzman kept his Year2000.com site up for two years past the turnover, with a note acknowledging that the information could be old.
The new member obliged, and Franklin read and returned the book a week later with a note acknowledging the favor, but nothing else.
This is a promising note, acknowledging that scripts are starting to provide ridiculous levels of detail that these experts are able to glean from the mess around the chalk drawings.
The Mayor also hit a lighter note, acknowledging the Detroit Tigers' recent sweep by the San Francisco Giants in the World Series.
In a letter to parents and students about the recent tuition increase, Mark Yudof, the University of California president, struck an apologetic note, acknowledging the "economic uncertainties and hardship" facing many families.
This had started a year earlier, when Keller and Jill Abramson, the managing editor, ran an editors' note acknowledging that some of the Times' reporting on Iraq's W.M.D.s — including several stories written by Miller — was "not as rigorous as it should have been".
On May 26th, the paper published an editor's note acknowledging that it had been improperly influenced by Chalabi.
On Dec. 5, Rolling Stone issued an editor's note acknowledging discrepancies in the story featuring UVA student Jackie's description of a horrific gang rape at a fraternity house.
