The BBC engaged in a "serious breach" of industry standards by failing to disclose that the presenter of a documentary about the Gaza situation was the offspring of a Hamas official, as determined by regulatory body Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
The regulator has instructed the broadcaster to air a peak-time announcement about its decisions.
"Given this constitutes a serious breach of our regulations, we are instructing the BBC to transmit a announcement of our conclusions against it on the BBC's second channel at 21:00, with a timing to be determined," the regulator stated.
'Possibility to Undermine Trust'
The watchdog's announcement said: "Our probe found that the documentary's omission to reveal that the presenter's father served in a post in the Hamas-run government was substantially inaccurate.
"Consequently that the public did not have critical information which may have been extremely pertinent to their assessment of the voice and the details he provided.
"Trust is at the heart of the connection between a television network and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the potential to damage the significantly high amounts of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The film was withdrawn from the online platform in the month of February after the boy's familial connections came to light, and in the month of July an corporation's own inquiry concluded it infringed the broadcaster's content policies on factual correctness.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we agree with the regulator's ruling in full. We will adhere to the penalty as soon as the schedule and wording are confirmed."
