Some estimates made by Doge, the body charged with reducing US government spending, that it saved billions of dollars are "incorrect or lack supporting evidence", a watchdog has found.
A report released on Thursday by the Government Accountability Office (GAO) has given an extensive review of Doge's claims about its so-called "Wall of Receipts", which reported savings of $110bn (£82bn) across contracts, grants and leases.
"Several issues limit the transparency and reliability of these reported savings," the report stated.
Asked for comment, a White House official said the administration told the GAO that all employees had to complete ethics training and follow financial disclosure requirements.