The BBC was found to have committed a "significant breach" of media regulations by omitting to mention that the voice of a documentary about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The chief executive of the broadcaster had previously apologised, saying there had been "a serious error in relation to accuracy".
The authority has ordered the corporation to broadcast a prime-time announcement about its decisions.
"Since this amounts to a serious breach of our code, we are ordering the corporation to broadcast a announcement of our determinations against it on BBC2 at 21:00, with a schedule to be determined," the regulator stated.
'Potential to Undermine Confidence'
The watchdog's announcement stated: "Our probe concluded that the programme's failure to disclose that the presenter's father held a post in the Hamas-run government was significantly deceptive.
"Consequently that the audience did not have critical information which may have been very significant to their evaluation of the voice and the information he shared.
"Credibility is at the core of the relationship between a television network and its public, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This failing had the possibility to undermine the exceptionally strong amounts of credibility that viewers would have put in a BBC factual programme about the Gaza conflict."
The documentary was withdrawn from the online platform in February after the boy's family links came to light, and in this past July an corporation's own inquiry found it violated the corporation's journalistic standards on truthfulness.
A representative for the broadcaster said: "The regulator's decision is in line with the results of the corporation's inquiry, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will follow the sanction as soon as the date and wording are finalised."
