The BBC engaged in a "major breach" of media regulations by omitting to mention that the narrator of a programme about the Gaza situation was the offspring of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The chief executive of the broadcaster had previously apologised, stating there had been "a significant failing in relation to accuracy".
The regulator has instructed the corporation to air a evening declaration about its findings.
"Given this constitutes a serious breach of our regulations, we are ordering the corporation to air a statement of our conclusions against it on BBC Two at 9pm, with a schedule to be confirmed," the statement read.
'Risk to Damage Trust'
The watchdog's statement said: "Our probe found that the programme's omission to reveal that the presenter's male guardian held a post in the Hamas-controlled administration was substantially inaccurate.
"This implied that the viewers did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he provided.
"Credibility is at the heart of the connection between a television network and its viewers, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to erode the very considerable levels of confidence that the public would have put in a factual film from the broadcaster about the conflict in Gaza."
The film was withdrawn from the online platform in February after the presenter's family links came to light, and in the month of July an broadcaster's internal assessment concluded it violated the broadcaster's content policies on factual correctness.
A corporation official commented: "The authority's determination is in agreement with the findings of the corporation's inquiry, that there was a major oversight in the documentary in relation to the corporation's content standards on truthfulness, which aligns with clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are determined."
