The public service broadcaster was found to have committed a "significant breach" of industry standards by failing to disclose that the presenter of a film about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the documentary was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a major oversight in relation to truthfulness".
The regulator has instructed the broadcaster to air a peak-time statement about its conclusions.
"Since this amounts to a serious breach of our rules, we are instructing the broadcaster to air a message of our conclusions against it on BBC Two at nine o'clock in the evening, with a schedule to be determined," it said.
'Potential to Damage Trust'
The authority's report stated: "Our investigation concluded that the film's omission to reveal that the voice's parent held a post in the Hamas-controlled administration was substantially inaccurate.
"This implied that the audience did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he presented.
"Credibility is at the heart of the connection between a television network and its audience, notably for a public service broadcaster such as the public broadcaster.
"This error had the possibility to erode the very considerable degrees of credibility that audiences would have invested in a BBC factual programme about the Israel-Gaza war."
The film was pulled from the BBC's streaming service in the month of February after the presenter's familial connections came to light, and in the month of July an broadcaster's internal assessment concluded it infringed the broadcaster's editorial guidelines on factual correctness.
A corporation official stated: "The Ofcom ruling is in agreement with the results of Peter Johnston's review, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which reflects regulation 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we agree with the authority's determination in complete. We will adhere to the sanction as soon as the schedule and wording are finalised."
