The minister made no mention of any prosecution of HP. The company's Polish unit was not immediately available for comment.
"I confirm that it's going to happen today. It's a breakthrough moment in Poland when a great international company acknowledges its corrupt activities in Poland," Sienkiewicz told Polish public radio.
The minister said Poland's Central Anti-Corruption Bureau had cooperated with the U.S. Federal Bureau of Investigation and the Securities and Exchange Commission on the issue.
(Reporting by Adrian Krajewski; Editing by Christian Lowe)