The public service broadcaster engaged in a "major breach" of media regulations by failing to disclose that the presenter of a programme about Gaza was the son of a Hamas administrator, as determined by UK media regulator Ofcom.
An investigation by Ofcom into the programme Gaza: How to Survive a Warzone has found that the programme was "significantly deceptive".
The BBC's director general had already issued an apology, stating there had been "a serious error in relation to accuracy".
Ofcom has instructed the BBC to transmit a evening announcement about its findings.
"As this represents a serious breach of our regulations, we are ordering the corporation to air a statement of our conclusions against it on BBC2 at 21:00, with a date to be finalised," the regulator stated.
'Risk to Damage Confidence'
The regulator's report said: "The inquiry we conducted found that the programme's lack of disclosure that the presenter's father occupied a post in the Hamas-administered administration was substantially inaccurate.
"It meant that the public did not have essential details which may have been extremely pertinent to their evaluation of the presenter and the content he provided.
"Credibility is at the heart of the bond between a media organization and its public, particularly for a national broadcasting corporation such as the BBC.
"This failing had the possibility to damage the exceptionally strong degrees of confidence that audiences would have put in a factual film from the broadcaster about the conflict in Gaza."
The documentary was removed from the online platform in the month of February after the presenter's family links came to light, and in the month of July an corporation's own inquiry determined it infringed the corporation's journalistic standards on factual correctness.
A corporation official stated: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a serious error 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 expressed regret for this and we comply with the authority's determination in full. We will follow the penalty as soon as the timing and language are confirmed."
