The British broadcaster was found to have committed a "major breach" of media regulations by failing to disclose that the presenter of a documentary about Gaza was the child of a Hamas representative, according to UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the corporation to broadcast a peak-time declaration about its decisions.
"As this represents a serious breach of our code, we are instructing the corporation to broadcast a statement of our determinations against it on the BBC's second channel at 21:00, with a schedule to be finalised," it said.
'Potential to Undermine Trust'
The regulator's report said: "Our investigation found that the programme's omission to reveal that the presenter's male guardian held a post in the Hamas-run administration was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the narrator and the content he provided.
"Trust is at the core of the relationship between a media organization and its audience, particularly for a national broadcasting corporation such as the BBC.
"This oversight had the risk to erode the very considerable levels of credibility that the public would have put in a BBC factual programme about the Israel-Gaza war."
The programme was pulled from iPlayer in last February after the narrator's personal associations came to light, and in the month of July an corporation's own inquiry found it breached the corporation's journalistic standards on factual correctness.
A representative for the broadcaster said: "The regulator's decision is in line with the results of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on truthfulness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the authority's determination in full. We will comply with the penalty as soon as the schedule and language are confirmed."
