The British broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a film about the Gaza conflict was the offspring of a Hamas official, according to British broadcasting authority Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has determined that the programme was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
Ofcom has directed the BBC to broadcast a prime-time announcement about its findings.
"As this represents a serious breach of our code, we are instructing the BBC to air a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," the regulator stated.
'Possibility to Undermine Credibility'
The regulator's announcement declared: "Our investigation concluded that the programme's failure to disclose that the voice's father held a post in the Hamas-controlled administration was materially misleading.
"It meant that the public did not have vital facts which may have been very significant to their judgment of the narrator and the details he shared.
"Confidence is at the heart of the connection between a television network and its viewers, notably for a public service broadcaster such as the public broadcaster.
"This error had the potential to undermine the significantly high degrees of confidence that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was removed from iPlayer in February after the presenter's personal associations were revealed, and in the month of July an corporation's own inquiry determined it infringed the broadcaster's journalistic standards on truthfulness.
A corporation official stated: "The regulator's decision is in line with the conclusions of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on truthfulness, which reflects Rule 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept the authority's determination in complete. We will follow the sanction as soon as the schedule and wording are determined."
