The BBC committed a "serious breach" of broadcasting rules by not revealing that the narrator of a programme about the Gaza situation was the offspring of a Hamas administrator, as ruled by British broadcasting authority Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
Ofcom has directed the BBC to transmit a peak-time declaration about its decisions.
"Since this amounts to a significant violation of our regulations, we are instructing the corporation to transmit a message of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be determined," the statement read.
'Possibility to Erode Trust'
The watchdog's statement said: "Our probe determined that the film's lack of disclosure that the presenter's parent held a position in the Hamas-run administration was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been very significant to their assessment of the voice and the information he shared.
"Credibility is at the center of the relationship between a media organization and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to undermine the exceptionally strong amounts of trust that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was pulled from the online platform in last February after the narrator's family links emerged, and in the month of July an corporation's own inquiry concluded it infringed the organization's content policies on factual correctness.
A BBC spokesperson commented: "The authority's determination is in line with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in full. We will adhere to the directive as soon as the date and language are determined."
