The British broadcaster committed a "major breach" of industry standards by failing to disclose that the narrator of a programme about Gaza was the offspring of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
The regulator has ordered the BBC to air a evening announcement about its findings.
"Since this amounts to a major infringement of our code, we are instructing the corporation to broadcast a statement of our findings against it on the BBC's second channel at nine o'clock in the evening, with a timing to be finalised," the regulator stated.
'Risk to Damage Confidence'
The authority's report declared: "Our probe found that the programme's failure to disclose that the presenter's parent held a position in the Hamas-run administration was significantly deceptive.
"This implied that the public did not have essential details which may have been extremely pertinent to their evaluation of the narrator and the details he shared.
"Credibility is at the heart of the bond between a broadcaster and its viewers, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to erode the exceptionally strong amounts of trust that the public would have put in a BBC factual programme about the Gaza conflict."
The documentary was removed from iPlayer in February after the narrator's family links were revealed, and in this past July an corporation's own inquiry determined it infringed the broadcaster's content policies on truthfulness.
A BBC spokesperson stated: "The Ofcom ruling is in accordance with the results of Peter Johnston's review, that there was a serious error in the film in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in full. We will follow the directive as soon as the schedule and wording are confirmed."
