The British broadcaster committed a "serious breach" of industry standards by omitting to mention that the voice of a film about the Gaza conflict was the offspring of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The BBC's director general had earlier expressed regret, stating there had been "a serious error in relation to accuracy".
Ofcom has instructed the BBC to transmit a prime-time declaration about its decisions.
"As this represents a serious breach of our code, we are ordering the BBC to air a statement of our findings against it on the BBC's second channel at 9pm, with a timing to be confirmed," the statement read.
'Possibility to Damage Confidence'
The authority's statement declared: "Our probe concluded that the programme's lack of disclosure that the narrator's parent served in a role in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been highly relevant to their evaluation of the voice and the content he shared.
"Trust is at the heart of the bond between a broadcaster and its viewers, especially for a state-funded media outlet such as the British Broadcasting Corporation.
"This error had the risk to damage the significantly high degrees of trust that viewers would have placed in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from iPlayer in last February after the narrator's familial connections came to light, and in July an broadcaster's internal assessment concluded it infringed the organization's editorial guidelines on accuracy.
A corporation official said: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a serious error in the documentary in relation to the broadcaster's journalistic policies on truthfulness, which reflects regulation 2.2 of the authority's broadcasting regulations.
"We expressed regret for this and we agree with the regulator's ruling in full. We will comply with the directive as soon as the timing and wording are confirmed."
