The public service broadcaster engaged in a "significant breach" of media regulations by omitting to mention that the narrator of a film about the Gaza conflict was the child of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "substantially inaccurate".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to truthfulness".
The authority has directed the corporation to broadcast a evening announcement about its decisions.
"As this represents a significant violation of our rules, we are directing the broadcaster to broadcast a message of our determinations against it on BBC Two at 9pm, with a schedule to be determined," the statement read.
'Potential to Damage Confidence'
The authority's report said: "Our probe determined that the programme's lack of disclosure that the presenter's male guardian held a role in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the public did not have critical information which may have been extremely pertinent to their judgment of the voice and the information he provided.
"Trust is at the core of the bond between a media organization and its public, particularly for a public service broadcaster such as the BBC.
"This error had the possibility to undermine the significantly high levels of credibility that viewers would have invested in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from iPlayer in February after the presenter's personal associations emerged, and in July an broadcaster's internal assessment found it breached the corporation's journalistic standards on accuracy.
A BBC spokesperson stated: "The regulator's decision is in line with the findings of the internal assessment, that there was a serious error in the film in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we accept the authority's determination in its entirety. We will adhere to the sanction as soon as the timing and wording are confirmed."
