The BBC was found to have committed a "major breach" of broadcasting rules by not revealing that the voice of a documentary about the Gaza conflict was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The regulator has directed the broadcaster to air a evening declaration about its conclusions.
"Given this constitutes a significant violation of our code, we are directing the BBC to transmit a announcement of our findings against it on BBC2 at 21:00, with a date to be determined," it said.
'Risk to Damage Credibility'
The regulator's report stated: "The inquiry we conducted concluded that the documentary's lack of disclosure that the voice's male guardian served in a position in the Hamas-run authority was materially misleading.
"Consequently that the viewers did not have vital facts which may have been highly relevant to their evaluation of the presenter and the information he shared.
"Confidence is at the heart of the relationship between a media organization and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to erode the very considerable levels of confidence that audiences would have put in a BBC factual programme about the Gaza conflict."
The film was withdrawn from the online platform in February after the narrator's personal associations emerged, and in July an broadcaster's internal assessment concluded it breached the organization's editorial guidelines on truthfulness.
A representative for the broadcaster commented: "The regulator's decision is in agreement with the findings of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in full. We will comply with the penalty as soon as the schedule and wording are determined."
