The British broadcaster engaged in a "significant breach" of broadcasting rules by failing to disclose that the voice of a documentary about Gaza was the son of a Hamas official, as ruled by British broadcasting authority Ofcom.
An investigation 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, saying there had been "a significant failing in relation to truthfulness".
The authority has directed the corporation to air a peak-time statement about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the corporation to air a announcement of our findings against it on BBC Two at 9pm, with a date to be determined," the statement read.
'Risk to Undermine Confidence'
The authority's report stated: "Our probe concluded that the film's omission to reveal that the voice's father served in a post in the Hamas-run administration was significantly deceptive.
"This implied that the viewers did not have critical information which may have been very significant to their evaluation of the voice and the details he provided.
"Confidence is at the core of the bond between a broadcaster and its viewers, particularly for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the risk to erode the exceptionally strong levels of trust that audiences would have invested in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from the online platform in last February after the narrator's family links came to light, and in this past July an broadcaster's internal assessment found it breached the corporation's content policies on accuracy.
A corporation official stated: "The regulator's decision is in agreement with the conclusions of the internal assessment, that there was a significant failing in the documentary in relation to the corporation's content standards on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in its entirety. We will comply with the penalty as soon as the schedule and wording are determined."
