The public service broadcaster engaged in a "serious breach" of broadcasting rules by not revealing that the presenter of a programme about the Gaza situation was the child of a Hamas official, as ruled by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The head of the BBC had earlier expressed regret, noting there had been "a significant failing in relation to factual correctness".
The regulator has directed the broadcaster to air a peak-time declaration about its decisions.
"As this represents a serious breach of our rules, we are instructing the broadcaster to transmit a message of our conclusions against it on BBC Two at 9pm, with a timing to be determined," the regulator stated.
'Risk to Undermine Trust'
The authority's announcement stated: "The inquiry we conducted found that the documentary's failure to disclose that the presenter's male guardian occupied a post in the Hamas-run authority was substantially inaccurate.
"It meant that the public did not have vital facts which may have been very significant to their evaluation of the presenter and the information he provided.
"Confidence is at the center of the connection between a media organization and its audience, particularly for a national broadcasting corporation such as the public broadcaster.
"This error had the possibility to damage the exceptionally strong amounts of trust that viewers would have put in a factual film from the broadcaster about the Gaza conflict."
The programme was withdrawn from the online platform in the month of February after the boy's personal associations came to light, and in the month of July an corporation's own inquiry found it infringed the organization's journalistic standards on accuracy.
A corporation official said: "The authority's determination is in line with the conclusions 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 regulation 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the authority's determination in full. We will adhere to the penalty as soon as the date and wording are confirmed."
