The BBC was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the narrator of a documentary about the Gaza conflict was the child of a Hamas official, as ruled by UK media regulator Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has determined that the film was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a serious error in relation to accuracy".
Ofcom has ordered the corporation to air a peak-time declaration about its findings.
"Given this constitutes a serious breach of our regulations, we are ordering the BBC to transmit a announcement of our findings against it on the BBC's second channel at 21:00, with a timing to be confirmed," it said.
'Potential to Undermine Trust'
The authority's statement stated: "Our investigation found that the documentary's lack of disclosure that the narrator's father occupied a post in the Hamas-run government was significantly deceptive.
"Consequently that the public did not have essential details which may have been highly relevant to their judgment of the presenter and the information he presented.
"Confidence is at the center of the bond between a media organization and its viewers, notably for a public service broadcaster such as the public broadcaster.
"This failing had the risk to damage the significantly high levels of credibility that the public would have placed in a documentary produced by the BBC about the conflict in Gaza."
The documentary was withdrawn from iPlayer in the month of February after the boy's familial connections were revealed, and in July an internal BBC review concluded it infringed the organization's editorial guidelines on truthfulness.
A corporation official commented: "The Ofcom ruling is in line with the findings of the corporation's inquiry, that there was a significant failing in the documentary in relation to the BBC's Editorial Guidelines on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We issued an apology for this and we comply with the regulator's ruling in full. We will adhere to the penalty as soon as the schedule and wording are confirmed."
