The BBC was found to have committed a "significant breach" of media regulations by not revealing that the voice of a programme about the Gaza conflict was the child of a Hamas official, as ruled by British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The regulator has directed the BBC to broadcast a peak-time announcement about its decisions.
"Given this constitutes a serious breach of our rules, we are directing the broadcaster to air a announcement of our determinations against it on the BBC's second channel at 9pm, with a date to be confirmed," it said.
'Possibility to Erode Confidence'
The authority's announcement said: "Our investigation determined that the programme's lack of disclosure that the presenter's male guardian held a position in the Hamas-run government was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been highly relevant to their judgment of the voice and the information he provided.
"Trust is at the center of the relationship between a media organization and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the possibility to erode the very considerable levels of trust that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the online platform in the month of February after the presenter's family links emerged, and in this past July an internal BBC review found it infringed the corporation's journalistic standards on truthfulness.
A representative for the broadcaster stated: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in complete. We will comply with the penalty as soon as the schedule and wording are finalised."
