The BBC engaged in a "major breach" of media regulations by not revealing that the presenter of a programme about the Gaza situation was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to truthfulness".
Ofcom has directed the broadcaster to transmit a evening announcement about its conclusions.
"Given this constitutes a significant violation of our code, we are instructing the broadcaster to air a statement of our findings against it on the BBC's second channel at 9pm, with a schedule to be finalised," it said.
'Potential to Erode Trust'
The authority's statement declared: "Our investigation found that the film's failure to disclose that the voice's father occupied a role in the Hamas-administered government was substantially inaccurate.
"Consequently that the public did not have vital facts which may have been very significant to their evaluation of the presenter and the content he shared.
"Trust is at the center of the connection between a broadcaster and its audience, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This oversight had the risk to damage the exceptionally strong levels of credibility that viewers would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was withdrawn from the online platform in the month of February after the presenter's familial connections came to light, and in July an corporation's own inquiry determined it violated the organization's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in accordance 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 factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in its entirety. We will comply with the sanction as soon as the timing and wording are confirmed."
