The BBC was found to have committed a "major breach" of industry standards by omitting to mention that the voice of a programme about the Gaza situation was the offspring of a Hamas administrator, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, saying there had been "a significant failing in relation to factual correctness".
Ofcom has ordered the BBC to broadcast a peak-time declaration about its conclusions.
"As this represents a serious breach of our regulations, we are instructing the broadcaster to air a announcement of our determinations against it on the BBC's second channel at 21:00, with a timing to be finalised," the statement read.
'Risk to Undermine Confidence'
The watchdog's report stated: "Our investigation determined that the documentary's failure to disclose that the voice's father held a post in the Hamas-run government was significantly deceptive.
"It meant that the public did not have vital facts which may have been extremely pertinent to their assessment of the presenter and the details he shared.
"Credibility is at the heart of the connection between a broadcaster and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to damage the exceptionally strong degrees of confidence that audiences would have invested in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from iPlayer in the month of February after the boy's familial connections came to light, and in this past July an broadcaster's internal assessment found it violated the corporation's content policies on factual correctness.
A BBC spokesperson said: "The authority's determination is in line with the findings of Peter Johnston's review, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in full. We will adhere to the directive as soon as the schedule and wording are confirmed."
