The British broadcaster was found to have committed a "significant breach" of broadcasting rules by failing to disclose that the presenter of a film about the Gaza conflict was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "substantially inaccurate".
The chief executive of the broadcaster had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
The authority has directed the BBC to air a peak-time announcement about its findings.
"Given this constitutes a significant violation of our rules, we are directing the BBC to transmit a message of our findings against it on the BBC's second channel at 21:00, with a timing to be confirmed," the regulator stated.
'Possibility to Undermine Trust'
The authority's statement declared: "Our probe concluded that the programme's omission to reveal that the narrator's father occupied a position in the Hamas-controlled government was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their evaluation of the voice and the content he provided.
"Trust is at the center of the bond between a television network and its public, especially for a national broadcasting corporation such as the BBC.
"This failing had the possibility to erode the very considerable levels of credibility that audiences would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from the online platform in last February after the narrator's family links came to light, and in July an broadcaster's internal assessment found it violated the broadcaster's editorial guidelines on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a major oversight in the programme in relation to the broadcaster's journalistic policies on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in complete. We will comply with the sanction as soon as the date and language are confirmed."
