The British broadcaster engaged in a "serious breach" of broadcasting rules by not revealing that the narrator of a film about Gaza was the son of a Hamas official, as ruled by regulatory body Ofcom.
An probe by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the documentary was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The regulator has ordered the broadcaster to broadcast a evening declaration about its findings.
"Given this constitutes a serious breach of our code, we are directing the corporation to air 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 finalised," the regulator stated.
'Risk to Damage Credibility'
The watchdog's report said: "Our investigation concluded that the programme's failure to disclose that the voice's male guardian held a role in the Hamas-administered government was significantly deceptive.
"Consequently that the audience did not have vital facts which may have been extremely pertinent to their evaluation of the presenter and the information he shared.
"Trust is at the heart of the relationship between a media organization and its audience, particularly for a state-funded media outlet such as the BBC.
"This oversight had the risk to undermine the exceptionally strong degrees of trust that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was removed from iPlayer in the month of February after the presenter's familial connections were revealed, and in the month of July an corporation's own inquiry found it breached the organization's content policies on truthfulness.
A BBC spokesperson stated: "The authority's determination is in agreement with the conclusions 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 reflects clause 2.2 of the regulator's media standards.
"We expressed regret for this and we accept Ofcom's decision in its entirety. We will adhere to the sanction as soon as the schedule and wording are finalised."
