The public service broadcaster was found to have committed a "major breach" of industry standards by not revealing that the narrator of a documentary about the Gaza conflict was the offspring of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by the media regulator into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
Ofcom has instructed the BBC to broadcast a evening declaration about its decisions.
"Given this constitutes a serious breach of our code, we are instructing the broadcaster to transmit a message of our conclusions against it on BBC Two at 21:00, with a schedule to be finalised," the regulator stated.
'Risk to Undermine Credibility'
The watchdog's statement said: "Our investigation found that the documentary's failure to disclose that the presenter's male guardian occupied a role in the Hamas-run administration was materially misleading.
"Consequently that the viewers did not have critical information which may have been extremely pertinent to their assessment of the presenter and the content he presented.
"Trust is at the core of the bond between a media organization and its viewers, particularly for a national broadcasting corporation such as the BBC.
"This failing had the possibility to damage the significantly high degrees of trust that viewers would have placed in a factual film from the broadcaster about the Israel-Gaza war."
The documentary was withdrawn from iPlayer in the month of February after the presenter's personal associations were revealed, and in this past July an internal BBC review concluded it breached the organization's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a major oversight in the documentary in relation to the broadcaster's journalistic policies on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we accept the regulator's ruling in its entirety. We will adhere to the sanction as soon as the date and language are confirmed."
