The BBC was found to have committed a "serious breach" of broadcasting rules by failing to disclose that the presenter of a documentary about the Gaza situation was the son of a Hamas representative, as determined by British broadcasting authority Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to truthfulness".
The authority has ordered the BBC to broadcast a peak-time declaration about its decisions.
"As this represents a major infringement of our regulations, we are directing the broadcaster to air a announcement of our findings against it on the BBC's second channel at 9pm, with a timing to be determined," the statement read.
'Risk to Damage Trust'
The authority's statement said: "The inquiry we conducted found that the programme's omission to reveal that the narrator's father served in a role in the Hamas-administered government was significantly deceptive.
"Consequently that the viewers did not have essential details which may have been extremely pertinent to their judgment of the narrator and the details he presented.
"Credibility is at the center of the relationship between a broadcaster and its public, notably for a national broadcasting corporation such as the BBC.
"This failing had the risk to damage the very considerable amounts of confidence that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The film was withdrawn from the online platform in the month of February after the presenter's personal associations came to light, and in the month of July an internal BBC review concluded it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in line with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we accept Ofcom's decision in complete. We will comply with the penalty as soon as the schedule and wording are finalised."
