The BBC engaged in a "serious breach" of industry standards by not revealing that the presenter of a film about the Gaza conflict was the child of a Hamas representative, as ruled by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has concluded 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 ordered the BBC to transmit a peak-time statement about its decisions.
"Given this constitutes a serious breach of our code, we are ordering the BBC to broadcast a message of our conclusions against it on the BBC's second channel at 9pm, with a date to be confirmed," it said.
'Possibility to Undermine Trust'
The regulator's statement said: "Our investigation found that the programme's omission to reveal that the narrator's male guardian held a position in the Hamas-administered administration was significantly deceptive.
"Consequently that the audience did not have critical information which may have been very significant to their assessment of the voice and the content he provided.
"Credibility is at the heart of the connection between a television network and its public, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to damage the significantly high amounts of trust that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The documentary was pulled from the online platform in the month of February after the presenter's personal associations were revealed, and in July an internal BBC review found it infringed the organization's content policies on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in agreement with the results of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in full. We will follow the sanction as soon as the schedule and wording are confirmed."
