The BBC was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas representative, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "materially misleading".
The head of the BBC had previously apologised, saying there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the BBC to broadcast a evening declaration about its conclusions.
"As this represents a significant violation of our regulations, we are directing the corporation to broadcast a announcement of our determinations against it on BBC Two at 21:00, with a timing to be finalised," the regulator stated.
'Potential to Erode Credibility'
The watchdog's report declared: "The inquiry we conducted determined that the documentary's lack of disclosure that the presenter's male guardian occupied a role in the Hamas-administered administration was significantly deceptive.
"This implied that the audience did not have vital facts which may have been very significant to their assessment of the voice and the information he presented.
"Credibility is at the core of the connection between a media organization and its viewers, notably for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to erode the significantly high levels of confidence that audiences would have invested in a BBC factual programme about the Gaza conflict."
The film was pulled from iPlayer in February after the boy's family links were revealed, and in this past July an corporation's own inquiry determined it infringed the corporation's content policies on factual correctness.
A BBC spokesperson said: "The authority's determination is in agreement with the findings of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which reflects clause 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in full. We will adhere to the sanction as soon as the timing and language are determined."
