The British broadcaster committed a "serious breach" of industry standards by not revealing that the voice of a programme about the Gaza situation was the son of a Hamas representative, as determined by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the BBC to transmit a evening announcement about its decisions.
"As this represents a serious breach of our rules, we are ordering the broadcaster to transmit a announcement of our conclusions against it on BBC2 at 9pm, with a date to be determined," the statement read.
'Risk to Damage Confidence'
The authority's announcement declared: "The inquiry we conducted determined that the documentary's lack of disclosure that the narrator's parent held a role in the Hamas-administered authority was substantially inaccurate.
"Consequently that the public did not have essential details which may have been very significant to their evaluation of the voice and the details he shared.
"Trust is at the center of the relationship between a broadcaster and its viewers, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This error had the potential to undermine the very considerable levels of credibility that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in the month of February after the presenter's family links emerged, and in the month of July an broadcaster's internal assessment determined it violated the broadcaster's journalistic standards on accuracy.
A BBC spokesperson stated: "The Ofcom ruling is in line with the conclusions of the corporation's inquiry, that there was a significant failing in the documentary in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the authority's determination in its entirety. We will adhere to the penalty as soon as the timing and language are confirmed."
