The phrase "acted duly" is correct and usable in written English.
It can be used to indicate that someone has acted in a proper or appropriate manner, often in a formal or legal context.
Example: "The committee acted duly in accordance with the established regulations during the meeting."
Alternatives: "acted appropriately" or "acted in accordance".
The party's senators performed a remarkable volte-face and, last week, the Zadroga Act duly passed.
The Republican-led House of Representatives, led by Boehner, told Democrats, "Either you postpone the Affordable Care Act (duly passed by Congress, upheld by the Supreme Court and, in essence, ratified again by the electorate in the last presidential election) or we will shut down the country".
According to Vidal, Boyd duly acted this as a love scene.
SEX -- Being half-naked all the time, Mathayus and Cassandra are more or less obliged to have sex at some point, which they do finally, but the act is duly obfuscated.
Why not join them?" His Bratz chair duly acts as an iPod speaker.
Ukip, polling at 18% in the latest Observer/Opinium findings, said the party was "non-racist, non-sectarian" and that "any comments made by members that fail to uphold these values will be duly investigated and acted upon".
"Steve Kember was brought in to perform the miracle act and duly delivered – ably assisted by Dougie Freedman, who played like a man possessed in those two games.
The government stopped conducting public executions in the early 20th century for much the same reason that it will use lethal injections rather than more brutal technologies to kill Timothy McVeigh -- to reinforce the distinction between a lynching and a soberly considered act of duly authorized justice.
At most, they are seen as "conveyor belts" that can pass on relevant information to their families or as unfinished "adults of tomorrow," duly trained to act appropriately when facing danger.
Act 1 was duly released then, with sales funding Act 2 to follow later this year.
