The public service broadcaster was found to have committed a "serious breach" of industry standards by not revealing that the narrator of a film about Gaza was the offspring of a Hamas administrator, according to regulatory body Ofcom.
An inquiry by the media regulator into Gaza: How to Survive a Warzone has found that the programme was "materially misleading".
The BBC's director general had previously apologised, stating there had been "a significant failing in relation to truthfulness".
Ofcom has instructed the broadcaster to air a evening declaration about its findings.
"Given this constitutes a major infringement of our regulations, we are ordering the broadcaster to broadcast a announcement of our conclusions against it on BBC Two at 9pm, with a timing to be confirmed," the regulator stated.
'Risk to Damage Trust'
The regulator's announcement declared: "Our probe found that the film's failure to disclose that the narrator's father held a position in the Hamas-administered government was materially misleading.
"It meant that the public did not have vital facts which may have been very significant to their judgment of the narrator and the content he presented.
"Credibility is at the center of the relationship between a media organization and its public, particularly for a national broadcasting corporation such as the BBC.
"This failing had the risk to undermine the very considerable levels of trust that audiences would have invested in a documentary produced by the BBC about the Gaza conflict."
The film was removed from iPlayer in the month of February after the boy's familial connections came to light, and in July an corporation's own inquiry found it breached the corporation's editorial guidelines on factual correctness.
A BBC spokesperson stated: "The regulator's decision is in line with the conclusions of the internal assessment, that there was a significant failing in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to clause 2.2 of the authority's broadcasting regulations.
"We have apologised for this and we agree with the regulator's ruling in complete. We will follow the directive as soon as the date and language are determined."
