The BBC was found to have committed a "significant breach" of industry standards by omitting to mention that the narrator of a programme about the Gaza conflict was the son of a Hamas administrator, according to UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The BBC's director general had already issued an apology, stating there had been "a significant failing in relation to accuracy".
The authority has ordered the BBC to transmit a prime-time declaration about its decisions.
"As this represents a serious breach of our rules, we are directing the broadcaster to transmit a message of our findings against it on BBC Two at 9pm, with a schedule to be determined," the regulator stated.
'Risk to Damage Confidence'
The authority's statement declared: "Our investigation found that the film's lack of disclosure that the voice's male guardian served in a position in the Hamas-run authority was significantly deceptive.
"Consequently that the viewers did not have critical information which may have been very significant to their evaluation of the presenter and the details he shared.
"Confidence is at the heart of the connection between a television network and its audience, especially for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the possibility to undermine the significantly high degrees of credibility that viewers would have put in a BBC factual programme about the Israel-Gaza war."
The programme was removed from iPlayer in the month of February after the boy's family links came to light, and in this past July an corporation's own inquiry found it infringed the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson said: "The regulator's decision is in line with the findings of the corporation's inquiry, that there was a serious error in the programme in relation to the BBC's Editorial Guidelines on accuracy, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we comply with the authority's determination in full. We will follow the directive as soon as the date and language are confirmed."
