The BBC was found to have committed a "serious breach" of media regulations by omitting to mention that the narrator of a film about Gaza was the child of a Hamas representative, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, stating there had been "a major oversight in relation to truthfulness".
Ofcom has instructed the BBC to broadcast a evening announcement about its findings.
"Given this constitutes a significant violation of our code, we are ordering the broadcaster to transmit a statement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be finalised," it said.
'Risk to Undermine Confidence'
The regulator's report declared: "The inquiry we conducted determined that the documentary's lack of disclosure that the presenter's male guardian held a role in the Hamas-controlled authority was materially misleading.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the presenter and the information he presented.
"Confidence is at the core of the relationship between a broadcaster and its viewers, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the potential to undermine the exceptionally strong degrees of trust that audiences would have invested in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from the online platform in February after the narrator's personal associations came to light, and in this past July an broadcaster's internal assessment determined it infringed the corporation's editorial guidelines on accuracy.
A BBC spokesperson commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will adhere to the sanction as soon as the timing and wording are confirmed."
