The BBC was found to have committed a "major breach" of industry standards by omitting to mention that the narrator of a film about Gaza was the child of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a major oversight in relation to accuracy".
Ofcom has ordered the broadcaster to broadcast a prime-time declaration about its findings.
"Given this constitutes a significant violation of our regulations, we are ordering the BBC to air a announcement of our findings against it on the BBC's second channel at 9pm, with a schedule to be determined," the statement read.
'Potential to Undermine Trust'
The watchdog's report stated: "Our probe found that the documentary's lack of disclosure that the presenter's parent occupied a position in the Hamas-administered administration was substantially inaccurate.
"This implied that the public did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he shared.
"Credibility is at the center of the relationship between a broadcaster and its viewers, especially for a public service broadcaster such as the BBC.
"This error had the risk to undermine the significantly high levels of trust that the public would have put in a BBC factual programme about the Israel-Gaza war."
The documentary was removed from the online platform in the month of February after the boy's familial connections came to light, and in this past July an broadcaster's internal assessment concluded it breached the corporation's journalistic standards on factual correctness.
A representative for the broadcaster said: "The authority's determination is in agreement with the conclusions 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 corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will follow the sanction as soon as the timing and wording are determined."
