The British broadcaster committed a "significant breach" of broadcasting rules by failing to disclose that the voice of a documentary about the Gaza situation was the child of a Hamas official, as ruled by British broadcasting authority Ofcom.
An inquiry by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, stating there had been "a serious error in relation to accuracy".
Ofcom has instructed the BBC to transmit a evening announcement about its findings.
"Given this constitutes a serious breach of our regulations, we are directing the corporation to transmit a message of our determinations against it on BBC Two at 21:00, with a timing to be confirmed," the regulator stated.
'Possibility to Erode Credibility'
The watchdog's statement declared: "Our probe determined that the programme's failure to disclose that the presenter's parent held a post in the Hamas-controlled administration was substantially inaccurate.
"This implied that the public did not have critical information which may have been very significant to their judgment of the narrator and the content he shared.
"Trust is at the core of the relationship between a media organization and its viewers, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to undermine the significantly high levels of confidence that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The programme was pulled from iPlayer in February after the presenter's personal associations were revealed, and in July an broadcaster's internal assessment found it breached the organization's content policies on accuracy.
A corporation official said: "The regulator's decision is in line with the findings of the internal assessment, that there was a significant failing in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in its entirety. We will follow the penalty as soon as the schedule and language are finalised."
