The British broadcaster was found to have committed a "major breach" of industry standards by omitting to mention that the narrator of a documentary about the Gaza conflict was the child of a Hamas representative, as ruled by British broadcasting authority Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The head of the BBC had previously apologised, saying there had been "a serious error in relation to factual correctness".
The regulator has ordered the broadcaster to air a peak-time declaration about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the broadcaster to transmit a statement of our conclusions against it on BBC2 at 21:00, with a schedule to be confirmed," the statement read.
'Possibility to Undermine Credibility'
The regulator's report said: "Our investigation determined that the programme's failure to disclose that the narrator's father served in a role in the Hamas-administered administration was significantly deceptive.
"It meant that the viewers did not have essential details which may have been very significant to their judgment of the presenter and the information he provided.
"Trust is at the center of the relationship between a broadcaster and its viewers, notably for a public service broadcaster such as the BBC.
"This error had the risk to undermine the very considerable levels of confidence that audiences would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The programme was removed from the online platform in February after the presenter's family links were revealed, and in July an corporation's own inquiry found it breached the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in agreement with the findings of the internal assessment, that there was a significant failing 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 the regulator's ruling in full. We will comply with the penalty as soon as the timing and wording are confirmed."
