The British broadcaster was found to have committed a "major breach" of broadcasting rules by omitting to mention that the presenter of a film about the Gaza conflict was the child of a Hamas administrator, as ruled by UK media regulator Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had already issued an apology, stating there had been "a major oversight in relation to accuracy".
The authority has instructed the corporation to broadcast a evening declaration about its findings.
"Given this constitutes a significant violation of our regulations, we are instructing the BBC to air a message of our findings against it on BBC Two at nine o'clock in the evening, with a schedule to be confirmed," it said.
'Possibility to Damage Trust'
The watchdog's statement said: "The inquiry we conducted found that the programme's failure to disclose that the presenter's male guardian held a position in the Hamas-administered government was materially misleading.
"Consequently that the audience did not have essential details which may have been extremely pertinent to their judgment of the presenter and the details he provided.
"Trust is at the heart of the connection between a television network and its viewers, particularly for a state-funded media outlet such as the British Broadcasting Corporation.
"This failing had the potential to erode the exceptionally strong amounts of credibility that viewers would have put in a factual film from the broadcaster about the conflict in Gaza."
The programme was withdrawn from iPlayer in last February after the presenter's family links came to light, and in July an corporation's own inquiry concluded it breached the broadcaster's content policies on truthfulness.
A BBC spokesperson commented: "The regulator's decision is in accordance with the conclusions of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with regulation 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the authority's determination in full. We will adhere to the directive as soon as the date and language are confirmed."
