The British broadcaster committed a "serious breach" of broadcasting rules by omitting to mention that the presenter of a documentary about the Gaza situation was the offspring of a Hamas administrator, according to UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a major oversight in relation to factual correctness".
The regulator has directed the BBC to air a evening declaration about its decisions.
"Given this constitutes a serious breach of our regulations, we are directing the BBC to transmit a statement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a schedule to be finalised," it said.
'Potential to Damage Credibility'
The authority's statement declared: "Our probe concluded that the programme's omission to reveal that the voice's parent served in a role in the Hamas-run authority was significantly deceptive.
"This implied that the viewers did not have essential details which may have been very significant to their assessment of the presenter and the content he shared.
"Credibility is at the core of the relationship between a television network and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the potential to undermine the very considerable amounts of trust that audiences would have put in a BBC factual programme about the conflict in Gaza."
The documentary was withdrawn from iPlayer in the month of February after the presenter's personal associations were revealed, and in July an corporation's own inquiry found it infringed the broadcaster's journalistic standards on factual correctness.
A BBC spokesperson said: "The authority's determination is in accordance with the conclusions of Peter Johnston's review, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which aligns with regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we accept Ofcom's decision in full. We will comply with the sanction as soon as the timing and language are determined."
