The BBC engaged in a "major breach" of industry standards by omitting to mention that the narrator of a documentary about the Gaza conflict was the son of a Hamas official, as determined by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to accuracy".
Ofcom has directed the corporation to air a evening declaration about its decisions.
"Given this constitutes a serious breach of our rules, we are directing the corporation to transmit a announcement of our conclusions against it on the BBC's second channel at 21:00, with a date to be confirmed," the statement read.
'Potential to Undermine Credibility'
The watchdog's report stated: "Our investigation concluded that the programme's omission to reveal that the voice's parent occupied a post in the Hamas-controlled administration was materially misleading.
"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 presented.
"Trust is at the core of the connection between a television network and its audience, notably for a public service broadcaster such as the BBC.
"This failing had the risk to damage the very considerable levels of credibility that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The film was removed from the BBC's streaming service in the month of February after the narrator's familial connections came to light, and in this past July an corporation's own inquiry concluded it violated the broadcaster's editorial guidelines on factual correctness.
A corporation official stated: "The Ofcom ruling is in agreement with the results of the internal assessment, that there was a serious error in the documentary in relation to the corporation's content standards on factual correctness, which corresponds to Rule 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept the authority's determination in complete. We will follow the penalty as soon as the schedule and wording are confirmed."
