The public service broadcaster committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a programme about Gaza was the son of a Hamas representative, as determined by UK media regulator Ofcom.
An investigation by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the film was "significantly deceptive".
The chief executive of the broadcaster had previously apologised, stating there had been "a major oversight in relation to factual correctness".
The authority has ordered the broadcaster to air a evening declaration about its findings.
"Since this amounts to a serious breach of our regulations, we are directing the BBC to transmit a message of our determinations against it on BBC Two at nine o'clock in the evening, with a schedule to be finalised," the regulator stated.
'Possibility to Damage Trust'
The authority's statement stated: "The inquiry we conducted determined that the programme's failure to disclose that the voice's father served in a post in the Hamas-run authority was significantly deceptive.
"It meant that the viewers did not have vital facts which may have been very significant to their evaluation of the voice and the information he shared.
"Trust is at the heart of the connection between a television network and its audience, particularly for a public service broadcaster such as the public broadcaster.
"This error had the possibility to erode the significantly high amounts of confidence that the public would have placed in a BBC factual programme about the conflict in Gaza."
The programme was removed from the online platform in February after the presenter's personal associations came to light, and in this past July an internal BBC review found it infringed the broadcaster's journalistic standards on truthfulness.
A corporation official commented: "The authority's determination is in line with the results of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to regulation 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the regulator's ruling in its entirety. We will follow the sanction as soon as the date and wording are confirmed."
