The public service broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the presenter of a programme about Gaza was the child of a Hamas official, as determined by British broadcasting authority Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to truthfulness".
Ofcom has ordered the broadcaster to broadcast a peak-time announcement about its decisions.
"Since this amounts to a serious breach of our rules, we are ordering the corporation to air a message of our determinations against it on BBC2 at 21:00, with a schedule to be confirmed," it said.
'Potential to Damage Trust'
The watchdog's announcement stated: "Our probe determined that the programme's failure to disclose that the presenter's male guardian occupied a post in the Hamas-administered authority was materially misleading.
"It meant that the public did not have critical information which may have been extremely pertinent to their assessment of the presenter and the details he provided.
"Confidence is at the core of the connection between a broadcaster and its audience, particularly for a national broadcasting corporation such as the BBC.
"This error had the risk to undermine the significantly high levels of confidence that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was pulled from the BBC's streaming service in last February after the boy's familial connections were revealed, and in the month of July an internal BBC review determined it breached the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the corporation's content standards on factual correctness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in its entirety. We will follow the directive as soon as the schedule and wording are finalised."
