The British broadcaster engaged in a "significant breach" of industry standards by failing to disclose that the presenter of a film about the Gaza conflict was the child of a Hamas administrator, as determined by regulatory body Ofcom.
An inquiry by the media regulator into the programme 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 serious error in relation to truthfulness".
Ofcom has instructed the broadcaster to air a evening declaration about its findings.
"Given this constitutes a significant violation of our code, we are instructing the BBC to transmit a announcement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a date to be confirmed," the statement read.
'Possibility to Erode Credibility'
The regulator's report stated: "The inquiry we conducted determined that the film's failure to disclose that the voice's male guardian occupied a post in the Hamas-administered government was materially misleading.
"This implied that the audience did not have essential details which may have been very significant to their judgment of the presenter and the details he provided.
"Trust is at the core of the connection between a television network and its viewers, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to damage the very considerable amounts of trust that viewers would have invested in a BBC factual programme about the conflict in Gaza."
The film was removed from the online platform in February after the presenter's familial connections came to light, and in the month of July an internal BBC review determined it violated the organization's journalistic standards on accuracy.
A representative for the broadcaster commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in full. We will adhere to the sanction as soon as the schedule and wording are determined."
