The British broadcaster was found to have committed a "significant breach" of media regulations by not revealing that the narrator of a documentary about the Gaza conflict was the son of a Hamas official, as ruled by regulatory body Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The head of the BBC had earlier expressed regret, stating there had been "a major oversight in relation to factual correctness".
The authority has directed the corporation to air a evening declaration about its decisions.
"Given this constitutes a major infringement of our rules, we are instructing the corporation to transmit a statement of our determinations against it on BBC2 at 21:00, with a timing to be finalised," it said.
'Risk to Undermine Credibility'
The regulator's announcement declared: "Our investigation concluded that the documentary's omission to reveal that the voice's parent served in a post in the Hamas-controlled government was materially misleading.
"This implied that the audience did not have critical information which may have been very significant to their evaluation of the presenter and the information he provided.
"Trust is at the center of the bond between a media organization and its audience, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the possibility to erode the exceptionally strong amounts of credibility that the public would have placed in a factual film from the broadcaster about the conflict in Gaza."
The programme was removed from iPlayer in February after the presenter's personal associations came to light, and in July an corporation's own inquiry found it infringed the corporation's content policies on factual correctness.
A corporation official stated: "The regulator's decision is in agreement with the findings of the corporation's inquiry, that there was a significant failing in the programme in relation to the broadcaster's journalistic policies on accuracy, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we comply with the authority's determination in complete. We will adhere to the sanction as soon as the timing and language are confirmed."
