The phrase "announced contributions" is correct and usable in written English.
It can be used when referring to contributions that have been publicly declared or made known, often in a formal context such as reports or announcements.
Example: "The organization highlighted the announced contributions of various donors during the annual meeting."
Alternatives: "declared contributions" or "disclosed contributions".
In response to UNICEF's emergency funding appeal to assist Pakistan's displaced children and their families, the Government of Japan and the Japan Committee for UNICEF, responsible for fund-raising from the private sector, announced contributions of $2 million respectively.
His announced contributions this election still come nowhere near the amount that he gave to try to unseat President George W. Bush in 2004.
The Mets and Cincinnati Reds announced their contributions, and the Yankees announced that George Steinbrenner, the team's principal owner, donated $1 million.
Whitehall departments announced their contributions towards the £11bn savings – many of them previously announced – including £4.35bn from the Department of Health and the NHS, £1.1bn from the Department for Children and £700m from the Ministry of Defence.
Earlier this spring, Japan and Germany both announced new contributions to the Global Fund — adding up to more than $400 million combined.
There's no doubt that Musk's commitment to climate change is a life-long dedication: he has declared himself politically independent and announced comparative contributions to PACs aligned to the Democrats.
Yale University today announced a contribution of $160 million by Edward P. Bass '67 toward the renovation of the Peabody Museum of Natural History.
François Hollande announced the contribution during a conference jointly organised by France and the United Arab Emirates in Abu Dhabi on Saturday.
One journalist announced her contribution in the middle of a press conference being held by the festival organisers.
This year, Hobart City Council announced a contribution of $700,000 for the next three years of the festival, with the state government handing over $2.1m for 2016 alone (a hefty increase from the $3m bestowed on the festival for the three years prior).
