The British broadcaster was found to have committed a "major breach" of media regulations by omitting to mention that the voice of a film about the Gaza situation was the child of a Hamas administrator, as ruled by regulatory body Ofcom.
An investigation by the media regulator into Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had already issued an apology, noting there had been "a significant failing in relation to truthfulness".
Ofcom has directed the corporation to transmit a peak-time announcement about its findings.
"Given this constitutes a major infringement of our rules, we are instructing the BBC to broadcast a announcement of our determinations against it on BBC Two at nine o'clock in the evening, with a timing to be determined," it said.
'Risk to Undermine Credibility'
The authority's report said: "The inquiry we conducted found that the programme's failure to disclose that the voice's male guardian served in a post in the Hamas-administered administration was significantly deceptive.
"It meant that the public did not have essential details which may have been highly relevant to their evaluation of the presenter and the content he provided.
"Trust is at the core of the connection between a broadcaster and its audience, notably for a public service broadcaster such as the public broadcaster.
"This oversight had the possibility to erode the exceptionally strong degrees of confidence that audiences would have put in a documentary produced by the BBC about the conflict in Gaza."
The film was pulled from iPlayer in February after the presenter's familial connections came to light, and in July an corporation's own inquiry found it infringed the corporation's editorial guidelines on truthfulness.
A representative for the broadcaster stated: "The Ofcom ruling is in line with the results of the internal assessment, that there was a significant failing in the film in relation to the broadcaster's journalistic policies on accuracy, which reflects clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we accept Ofcom's decision in complete. We will follow the directive as soon as the timing and language are finalised."
