The British broadcaster engaged in a "serious breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza situation was the son of a Hamas administrator, according to regulatory body Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "significantly deceptive".
The head of the BBC had previously apologised, stating there had been "a significant failing in relation to truthfulness".
The authority has instructed the BBC to broadcast a evening declaration about its decisions.
"Since this amounts to a significant violation of our rules, we are instructing the broadcaster to broadcast a announcement of our determinations against it on the BBC's second channel at 9pm, with a schedule to be determined," the statement read.
'Risk to Erode Confidence'
The watchdog's report said: "The inquiry we conducted determined that the documentary's failure to disclose that the voice's parent served in a post in the Hamas-run administration was substantially inaccurate.
"This implied that the audience did not have vital facts which may have been extremely pertinent to their judgment of the presenter and the information he shared.
"Confidence is at the center of the bond between a television network and its viewers, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to damage the very considerable amounts of credibility that audiences would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was withdrawn from iPlayer in last February after the narrator's familial connections came to light, and in this past July an internal BBC review concluded it breached the organization's editorial guidelines on factual correctness.
A corporation official commented: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the film in relation to the BBC's Editorial Guidelines on truthfulness, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with Ofcom's decision in full. We will comply with the directive as soon as the schedule and language are finalised."
