The BBC was found to have committed a "serious breach" of industry standards by failing to disclose that the presenter of a programme about the Gaza conflict was the son of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The chief executive of the broadcaster had already issued an apology, stating there had been "a major oversight in relation to accuracy".
Ofcom has directed the corporation to broadcast a prime-time statement about its decisions.
"Given this constitutes a serious breach of our rules, we are instructing the BBC to air a statement of our determinations against it on BBC Two at 9pm, with a timing to be finalised," the statement read.
'Potential to Erode Confidence'
The authority's statement declared: "Our investigation concluded that the documentary's lack of disclosure that the voice's parent occupied a post in the Hamas-run government was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their judgment of the presenter and the details he presented.
"Confidence is at the heart of the connection between a broadcaster and its audience, notably for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the very considerable degrees of credibility that audiences would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The programme was pulled from the online platform in last February after the presenter's family links were revealed, and in July an internal BBC review found it violated the corporation's content policies on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in full. We will follow the directive as soon as the schedule and wording are confirmed."
