The BBC was found to have committed a "serious breach" of industry standards by not revealing that the voice of a documentary about the Gaza conflict was the offspring of a Hamas administrator, as ruled by regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to truthfulness".
The authority has instructed the broadcaster to broadcast a evening statement about its conclusions.
"Given this constitutes a serious breach of our code, we are directing the corporation to air a announcement of our conclusions against it on the BBC's second channel at 9pm, with a date to be finalised," it said.
'Possibility to Erode Trust'
The watchdog's statement stated: "Our investigation concluded that the documentary's failure to disclose that the voice's parent held a post in the Hamas-run administration was significantly deceptive.
"It meant that the audience did not have critical information which may have been highly relevant to their evaluation of the voice and the details he provided.
"Credibility is at the heart of the connection between a broadcaster and its public, especially for a public service broadcaster such as the public broadcaster.
"This failing had the risk to damage the exceptionally strong amounts of trust that audiences would have put in a BBC factual programme about the conflict in Gaza."
The documentary was removed from the online platform in last February after the boy's family links were revealed, and in this past July an internal BBC review determined it violated the corporation's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in agreement with the results 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 corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we agree with the authority's determination in full. We will comply with the directive as soon as the date and language are determined."
