The BBC committed a "significant breach" of broadcasting rules by omitting to mention that the narrator of a film about the Gaza situation was the son of a Hamas official, as ruled by UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has found that the documentary was "substantially inaccurate".
The head of the BBC had earlier expressed regret, stating there had been "a significant failing in relation to truthfulness".
The regulator has directed the broadcaster to broadcast a peak-time statement about its decisions.
"Since this amounts to a significant violation of our regulations, we are ordering the corporation to transmit a announcement of our conclusions against it on BBC2 at nine o'clock in the evening, with a schedule to be confirmed," it said.
'Risk to Undermine Trust'
The watchdog's report stated: "The inquiry we conducted found that the documentary's lack of disclosure that the voice's parent served in a position in the Hamas-administered administration was substantially inaccurate.
"It meant that the audience did not have essential details which may have been highly relevant to their evaluation of the narrator and the details he shared.
"Credibility is at the center of the bond between a broadcaster and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This failing had the possibility to damage the very considerable degrees of credibility that viewers would have invested in a BBC factual programme about the Gaza conflict."
The programme was pulled from iPlayer in February after the boy's personal associations came to light, and in the month of July an broadcaster's internal assessment concluded it breached the organization's editorial guidelines on factual correctness.
A representative for the broadcaster commented: "The Ofcom ruling is in line with the results of the internal assessment, that there was a serious error in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects Rule 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 penalty as soon as the timing and wording are determined."
