The public service broadcaster committed a "major breach" of media regulations by failing to disclose that the narrator of a programme about the Gaza situation was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The chief executive of the broadcaster had already issued an apology, stating there had been "a significant failing in relation to accuracy".
Ofcom has directed the corporation to broadcast a peak-time announcement about its findings.
"As this represents a major infringement of our rules, we are instructing the broadcaster to broadcast a announcement of our findings against it on BBC Two at nine o'clock in the evening, with a date to be finalised," it said.
'Potential to Damage Credibility'
The watchdog's statement declared: "Our probe concluded that the programme's failure to disclose that the narrator's father served in a role in the Hamas-administered administration was substantially inaccurate.
"Consequently that the public did not have essential details which may have been highly relevant to their assessment of the presenter and the content he provided.
"Confidence is at the heart of the relationship between a television network and its public, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the significantly high amounts of credibility that audiences would have placed in a BBC factual programme 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 internal BBC review determined it breached the corporation's content policies on accuracy.
A BBC spokesperson stated: "The regulator's decision is in agreement with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which corresponds to Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we accept the authority's determination in full. We will follow the directive as soon as the date and wording are confirmed."
