The British broadcaster was found to have committed a "major breach" of industry standards by not revealing that the narrator of a film about the Gaza conflict was the child of a Hamas official, as determined by UK media regulator Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had already issued an apology, saying there had been "a serious error in relation to accuracy".
The regulator has directed the broadcaster to air a prime-time announcement about its decisions.
"Given this constitutes a major infringement of our rules, we are instructing the BBC to air a message of our conclusions against it on BBC2 at 9pm, with a date to be confirmed," the statement read.
'Possibility to Undermine Trust'
The regulator's announcement stated: "Our probe concluded that the programme's failure to disclose that the presenter's father occupied a post in the Hamas-controlled administration was substantially inaccurate.
"It meant that the audience did not have essential details which may have been extremely pertinent to their assessment of the presenter and the details he presented.
"Trust is at the center of the connection between a television network and its public, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to erode the exceptionally strong levels of credibility that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the online platform in February after the presenter's family links emerged, and in the month of July an corporation's own inquiry concluded it violated the organization's journalistic standards on truthfulness.
A BBC spokesperson stated: "The regulator's decision is in accordance with the findings of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in complete. We will comply with the penalty as soon as the date and wording are confirmed."
