The public service broadcaster committed a "significant breach" of media regulations by omitting to mention that the narrator of a film about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a serious error in relation to factual correctness".
The authority has ordered the BBC to air a prime-time statement about its findings.
"Given this constitutes a significant violation of our code, we are directing the BBC to transmit a statement of our determinations against it on the BBC's second channel at nine o'clock in the evening, with a timing to be determined," the statement read.
'Potential to Erode Confidence'
The authority's report said: "Our investigation concluded that the documentary's omission to reveal that the narrator's parent occupied a role in the Hamas-run authority 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 details he provided.
"Trust is at the heart of the relationship between a television network and its viewers, notably for a public service broadcaster such as the BBC.
"This oversight had the potential to damage the very considerable degrees of confidence that audiences would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was removed from iPlayer in February after the narrator's familial connections came to light, and in this past July an internal BBC review found it breached the broadcaster's content policies on factual correctness.
A representative for the broadcaster commented: "The authority's determination is in line with the results of the corporation's inquiry, that there was a serious error in the programme in relation to the corporation's content standards on truthfulness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we accept Ofcom's decision in full. We will adhere to the penalty as soon as the date and wording are finalised."
