The phrase "acknowledged participation" is correct and usable in written English.
It can be used in contexts where you want to indicate that someone's involvement or contribution has been recognized or accepted.
Example: "The committee expressed gratitude for the acknowledged participation of all volunteers in the event."
Alternatives: "recognized involvement" or "accepted contribution".
Although no other environmental group has acknowledged participation in the hoax, at least one voiced approval.
Pakistani officials have said that he acknowledged participation in the bombing when he was arrested shortly after landing in Karachi on a flight from Kenya only hours after the bombings.
Ten publications acknowledged participation from LMC centers, but did not have any authors from LMCs.
Health workers acknowledged participation in training workshops was of particular importance in understanding the changing landscape of malaria resistance, how to use RDTs for malaria and for understanding the new drug combinations for treating uncomplicated malaria and the complex dosage regimes that accompany these medicines.
Four thousand people signed confessions acknowledging participation in the events of the rebellion (in exchange for amnesty); several hundred participants were eventually indicted on charges relating to the rebellion.
The presence of the perjury charges would make it possible for Mr. Schwarz to acknowledge a misstatement without acknowledging participation in the sexual assault.
The Crime and the Silence is Anna Bikont's painstaking, beautifully written account of how modern-day Poles refused to acknowledge participation in a 1942 small town massacre of Jews.
Mr. Moussaoui, standing at a lectern in a green prison jumpsuit, at first tried to enter what he called a "pure plea," in which he would acknowledge participation in a terrorist group since 1995.
And standard policy at most companies now requires that scientific articles acknowledge participation of any industry-sponsored writers or contributors; such writers may be listed as co-authors or in the acknowledgements section.
This factor acknowledges participation by campus police in federal criminal investigations.
The government of then-President Mauricio Funes at first denied, then was forced to acknowledge, participation in the negotiations.
