The public service broadcaster committed a "major breach" of industry standards by not revealing that the presenter of a documentary about Gaza was the child of a Hamas administrator, as determined by UK media regulator Ofcom.
An inquiry by Ofcom into the programme Gaza: How to Survive a Warzone has determined that the film was "substantially inaccurate".
The head of the BBC had earlier expressed regret, saying there had been "a serious error in relation to factual correctness".
Ofcom has directed the corporation to transmit a peak-time announcement about its findings.
"As this represents a major infringement of our rules, we are directing the corporation to transmit a message of our conclusions against it on the BBC's second channel at 9pm, with a date to be confirmed," the regulator stated.
'Potential to Damage Credibility'
The watchdog's report declared: "Our investigation determined that the programme's omission to reveal that the voice's father occupied a post in the Hamas-controlled authority was substantially inaccurate.
"Consequently that the viewers did not have essential details which may have been very significant to their evaluation of the voice and the content he presented.
"Confidence is at the center of the relationship between a broadcaster and its viewers, particularly for a public service broadcaster such as the BBC.
"This failing had the risk to erode the exceptionally strong degrees of trust that the public would have invested in a documentary produced by the BBC about the Gaza conflict."
The documentary was withdrawn from the online platform in last February after the presenter's personal associations emerged, and in July an internal BBC review determined it infringed the corporation's content policies on factual correctness.
A corporation official said: "The Ofcom ruling is in accordance with the conclusions of Peter Johnston's review, that there was a major oversight in the film in relation to the corporation's content standards on accuracy, which corresponds to Rule 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in its entirety. We will adhere to the directive as soon as the date and language are finalised."
