The phrase "acknowledged mark" is correct and usable in written English.
It can be used in contexts where you want to refer to a recognized or accepted symbol, sign, or indication of something.
Example: "The acknowledged mark of quality in this industry is the ISO certification."
Alternatives: "recognized symbol" or "accepted sign".
Of the 91 voters interviewed whose ballots had either missing or late postmarks, 30 acknowledged marking ballots late.
"It was," Mr. Ryley acknowledged, marking the first time a British television news operation has admitted breaking the law in search of stories.
But the telephone call, as Bailey was to later acknowledge, marked the beginning of a journey that transformed his life.
Christie acknowledged the Mark 14s were running deeper than set, but attributed the failures to poor maintenance and errors on the part of the captain and crew.
For a start, it will be 350 years since the publication of Robert Boyle's "The Sceptical Chymist", generally acknowledged as marking the birth of modern chemistry.
"It is up to young leaders of today including the Duke and Duchess of Cambridge to acknowledge this mark on our history and not allow it to stand.
The fact that atheism is a minority position in every modern nation does not typically move the atheist to acknowledge a mark against her view.
With Sonic Youth, the acknowledged high-water mark is "Daydream Nation," from 1988, which is a superb record.
Mr. Zucker acknowledged the negative marks he had received for his handling of the entertainment operation at NBC when he was the chief executive there, saying, "there is no doubt I made mistakes" running NBC Entertainment.
Mr. Aguayo, who has installed energy recovery ventilators in the two-bedroom units at 96 St. Marks, acknowledged that with many of the components for passive houses not made in the United States, it costs more to create passive homes.
