The British broadcaster engaged in a "significant breach" of industry standards by not revealing that the presenter of a programme about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the programme was "significantly deceptive".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to truthfulness".
Ofcom has directed the BBC to broadcast a peak-time statement about its findings.
"Given this constitutes a major infringement of our regulations, we are directing the BBC to air a message of our determinations against it on BBC Two at 9pm, with a schedule to be confirmed," it said.
'Potential to Damage Trust'
The authority's announcement stated: "Our investigation concluded that the programme's omission to reveal that the presenter's parent served in a post in the Hamas-run administration was significantly deceptive.
"This implied that the audience did not have vital facts which may have been highly relevant to their assessment of the voice and the details he provided.
"Confidence is at the center of the bond between a television network and its public, especially for a national broadcasting corporation such as the public broadcaster.
"This failing had the risk to damage the exceptionally strong amounts of confidence that the public would have put in a documentary produced by the BBC about the Israel-Gaza war."
The programme was removed from the BBC's streaming service in last February after the boy's personal associations emerged, and in this past July an internal BBC review determined it violated the corporation's content policies on truthfulness.
A corporation official stated: "The regulator's decision is in agreement with the findings of Peter Johnston's review, that there was a serious error in the programme in relation to the corporation's content standards on accuracy, which reflects Rule 2.2 of the regulator's media standards.
"We issued an apology for this and we comply with the authority's determination in complete. We will follow the penalty as soon as the date and wording are confirmed."
