The BBC was found to have committed a "serious breach" of industry standards by omitting to mention that the voice of a film about the Gaza situation was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The head of the BBC had previously apologised, stating there had been "a significant failing in relation to accuracy".
The authority has instructed the broadcaster to broadcast a prime-time announcement about its decisions.
"Since this amounts to a major infringement of our rules, we are ordering the broadcaster to broadcast a statement of our findings against it on BBC2 at 21:00, with a schedule to be determined," the statement read.
'Possibility to Damage Credibility'
The watchdog's statement declared: "Our investigation concluded that the programme's lack of disclosure that the narrator's father occupied a position in the Hamas-controlled administration was materially misleading.
"Consequently that the public did not have essential details which may have been very significant to their assessment of the narrator and the content he provided.
"Confidence is at the center of the bond between a broadcaster and its audience, notably for a public service broadcaster such as the public broadcaster.
"This failing had the possibility to undermine the significantly high amounts of trust that viewers would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in last February after the narrator's familial connections emerged, and in the month of July an broadcaster's internal assessment found it violated the broadcaster's editorial guidelines on truthfulness.
A corporation official said: "The authority's determination is in agreement with the results of the internal assessment, that there was a significant failing in the film in relation to the corporation's content standards on accuracy, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we accept Ofcom's decision in complete. We will comply with the penalty as soon as the schedule and wording are confirmed."
