The BBC committed a "major breach" of media regulations by not revealing that the voice of a programme about the Gaza situation was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to factual correctness".
The authority has ordered the corporation to air a peak-time statement about its conclusions.
"As this represents a major infringement of our regulations, we are instructing the corporation to broadcast a message of our determinations against it on the BBC's second channel at 9pm, with a schedule to be determined," the regulator stated.
'Possibility to Erode Credibility'
The authority's statement said: "Our investigation concluded that the programme's lack of disclosure that the narrator's parent served in a role in the Hamas-run authority was significantly deceptive.
"It meant that the audience did not have essential details which may have been very significant to their assessment of the presenter and the details he shared.
"Credibility is at the center of the relationship between a television network and its public, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the significantly high amounts of credibility that the public would have put in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the BBC's streaming service in the month of February after the presenter's personal associations came to light, and in this past July an broadcaster's internal assessment determined it violated the corporation's editorial guidelines on truthfulness.
A corporation official stated: "The regulator's decision is in agreement with the results of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the regulator's media standards.
"We issued an apology for this and we agree with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are confirmed."
