The BBC was found to have committed a "significant breach" of media regulations by omitting to mention that the voice of a film about Gaza was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to accuracy".
The authority has directed the corporation to broadcast a evening statement about its conclusions.
"As this represents a serious breach of our rules, we are directing the broadcaster to transmit a message of our determinations against it on the BBC's second channel at 21:00, with a timing to be finalised," the statement read.
'Potential to Undermine Confidence'
The watchdog's announcement declared: "Our investigation concluded that the programme's lack of disclosure that the narrator's male guardian served in a post in the Hamas-administered government was substantially inaccurate.
"This implied that the viewers did not have critical information which may have been highly relevant to their evaluation of the presenter and the details he shared.
"Trust is at the center of the bond between a broadcaster and its viewers, particularly for a state-funded media outlet such as the BBC.
"This failing had the potential to damage the significantly high degrees of confidence that audiences would have placed in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the online platform in February after the presenter's familial connections were revealed, and in July an broadcaster's internal assessment determined it violated the organization's content policies on factual correctness.
A representative for the broadcaster stated: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which aligns with clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with Ofcom's decision in its entirety. We will follow the penalty as soon as the schedule and wording are confirmed."
