The BBC was found to have committed a "serious breach" of industry standards by not revealing that the voice of a programme about the Gaza conflict was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The chief executive of the broadcaster had previously apologised, noting there had been "a significant failing in relation to accuracy".
The authority has directed the broadcaster to transmit a peak-time announcement about its decisions.
"As this represents a major infringement of our regulations, we are instructing the corporation to broadcast a announcement of our findings against it on the BBC's second channel at 9pm, with a date to be finalised," the regulator stated.
'Potential to Erode Credibility'
The regulator's announcement stated: "Our probe found that the programme's failure to disclose that the narrator's parent occupied a post in the Hamas-controlled government was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been extremely pertinent to their assessment of the voice and the details he presented.
"Confidence is at the center of the connection between a television network and its audience, notably for a state-funded media outlet such as the public broadcaster.
"This error had the possibility to damage the significantly high levels of credibility that the public would have invested in a BBC factual programme about the Israel-Gaza war."
The documentary was pulled from the online platform in the month of February after the presenter's personal associations were revealed, and in this past July an corporation's own inquiry determined it breached the corporation's content policies on truthfulness.
A corporation official said: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a serious error in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."
