The public service broadcaster committed a "serious breach" of broadcasting rules by failing to disclose that the voice of a documentary about the Gaza situation was the son of a Hamas official, according to UK media regulator Ofcom.
An inquiry by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to accuracy".
Ofcom has directed the broadcaster to air a evening declaration about its decisions.
"Given this constitutes a serious breach of our regulations, we are ordering the broadcaster to broadcast a message of our determinations 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 Undermine Trust'
The authority's statement said: "Our probe found that the film's failure to disclose that the narrator's parent held a post in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have essential details which may have been highly relevant to their judgment of the presenter and the information he shared.
"Trust is at the core of the relationship between a media organization and its viewers, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to undermine the exceptionally strong levels of trust that viewers would have put in a BBC factual programme about the Israel-Gaza war."
The documentary was removed from iPlayer in last February after the boy's family links were revealed, and in this past July an internal BBC review found it violated the organization's editorial guidelines on truthfulness.
A corporation official commented: "The regulator's decision is in accordance with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which reflects clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with Ofcom's decision in complete. We will follow the penalty as soon as the date and wording are confirmed."
