The public service broadcaster engaged in a "major breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza conflict was the son of a Hamas official, according to regulatory body Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "significantly deceptive".
The BBC's director general had previously apologised, saying there had been "a major oversight in relation to accuracy".
The regulator has instructed the BBC to air a peak-time announcement about its findings.
"As this represents a serious breach of our regulations, we are ordering the BBC to transmit a announcement 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.
'Potential to Erode Confidence'
The regulator's statement said: "Our probe found that the programme's omission to reveal that the narrator's parent held a role in the Hamas-administered government was significantly deceptive.
"It meant that the public did not have vital facts which may have been very significant to their assessment of the narrator and the content he presented.
"Confidence is at the core of the bond between a broadcaster and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This oversight had the risk to erode the very considerable levels of trust that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The film was pulled from the BBC's streaming service in February after the boy's family links were revealed, and in the month of July an broadcaster's internal assessment concluded it infringed the corporation's content policies on accuracy.
A BBC spokesperson stated: "The authority's determination is in line with the conclusions of the corporation's inquiry, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we accept the regulator's ruling in full. We will adhere to the directive as soon as the timing and wording are confirmed."
