The British broadcaster engaged in a "serious breach" of industry standards by failing to disclose that the voice of a programme about the Gaza situation was the child of a Hamas official, according to regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a major oversight in relation to truthfulness".
Ofcom has directed the corporation to transmit a prime-time announcement about its conclusions.
"Given this constitutes a serious breach of our rules, we are instructing the broadcaster to air a statement of our findings against it on BBC Two at 21:00, with a date to be confirmed," the regulator stated.
'Risk to Damage Confidence'
The regulator's statement declared: "Our probe found that the programme's failure to disclose that the presenter's father occupied a post in the Hamas-run authority was materially misleading.
"It meant that the viewers did not have essential details which may have been very significant to their evaluation of the presenter and the content he shared.
"Credibility is at the center of the relationship between a broadcaster and its audience, particularly for a public service broadcaster such as the BBC.
"This oversight had the possibility to erode the very considerable degrees of credibility that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from the BBC's streaming service in last February after the presenter's family links came to light, and in this past July an internal BBC review found it breached the corporation's journalistic standards on accuracy.
A representative for the broadcaster said: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which corresponds to clause 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in its entirety. We will comply with the penalty as soon as the schedule and wording are finalised."
