The public service broadcaster was found to have committed a "significant breach" of industry standards by not revealing that the voice of a programme about the Gaza situation was the son of a Hamas administrator, according to UK media regulator Ofcom.
An probe by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the film was "significantly deceptive".
The BBC's director general had earlier expressed regret, saying there had been "a major oversight in relation to accuracy".
Ofcom has ordered the broadcaster to air a evening statement about its decisions.
"Since this amounts to a major infringement of our rules, we are directing the BBC to transmit a message of our findings against it on the BBC's second channel at 9pm, with a timing to be finalised," the statement read.
'Potential to Erode Trust'
The watchdog's report said: "Our investigation determined that the programme's omission to reveal that the presenter's parent served in a position in the Hamas-administered administration was substantially inaccurate.
"It meant that the audience did not have critical information which may have been very significant to their assessment of the voice and the content he provided.
"Confidence is at the core of the relationship between a television network and its audience, particularly for a state-funded media outlet such as the BBC.
"This failing had the risk to damage the exceptionally strong levels of trust that audiences would have placed in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from the online platform in February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry concluded it infringed the organization's journalistic standards on accuracy.
A representative for the broadcaster said: "The Ofcom ruling is in accordance with the results of the internal assessment, that there was a major oversight in the documentary in relation to the BBC's Editorial Guidelines on truthfulness, which reflects regulation 2.2 of the regulator's media standards.
"We have apologised 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."
