The BBC was found to have committed a "major breach" of media regulations by not revealing that the presenter of a film about the Gaza conflict was the son of a Hamas administrator, as ruled by UK media regulator Ofcom.
An inquiry by Ofcom into Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to truthfulness".
The regulator has directed the corporation to air a evening statement about its decisions.
"Given this constitutes a major infringement of our code, we are ordering the corporation to air a statement of our conclusions against it on BBC2 at 21:00, with a date to be determined," it said.
'Potential to Undermine Confidence'
The authority's announcement stated: "The inquiry we conducted concluded that the programme's omission to reveal that the presenter's father served in a post in the Hamas-run administration was materially misleading.
"This implied that the public did not have essential details which may have been very significant to their assessment of the narrator and the information he provided.
"Confidence is at the heart of the relationship between a broadcaster and its audience, particularly for a national broadcasting corporation such as the British Broadcasting Corporation.
"This error had the risk to undermine the significantly high degrees of trust that viewers would have put in a documentary produced by the BBC about the Gaza conflict."
The film was removed from the online platform in the month of February after the narrator's family links emerged, and in July an broadcaster's internal assessment determined it infringed the corporation's journalistic standards on factual correctness.
A corporation official stated: "The regulator's decision is in accordance with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept Ofcom's decision in complete. We will comply with the directive as soon as the timing and wording are determined."
