The public service broadcaster was found to have committed a "serious breach" of broadcasting rules by not revealing that the voice of a programme about the Gaza situation was the offspring of a Hamas administrator, according to British broadcasting authority Ofcom.
An probe by Ofcom into Gaza: How to Survive a Warzone has found that the film was "substantially inaccurate".
The BBC's director general had earlier expressed regret, noting there had been "a major oversight in relation to truthfulness".
The authority has instructed the broadcaster to air a prime-time announcement about its decisions.
"Given this constitutes a significant violation of our regulations, we are ordering the corporation to broadcast a message of our determinations against it on the BBC's second channel at 9pm, with a date to be finalised," the statement read.
'Risk to Damage Confidence'
The watchdog's report said: "Our investigation determined that the programme's lack of disclosure that the presenter's father held a post in the Hamas-controlled government was materially misleading.
"This implied that the viewers did not have essential details which may have been extremely pertinent to their judgment of the presenter and the information he presented.
"Trust is at the center of the bond between a broadcaster and its public, notably for a state-funded media outlet such as the public broadcaster.
"This oversight had the potential to damage the exceptionally strong degrees of confidence that the public would have put in a factual film from the broadcaster about the Gaza conflict."
The documentary was pulled from iPlayer in February after the boy's familial connections were revealed, and in the month of July an corporation's own inquiry concluded it breached the corporation's editorial guidelines on accuracy.
A representative for the broadcaster said: "The authority's determination is in agreement with the results of the internal assessment, that there was a serious error in the film in relation to the BBC's Editorial Guidelines on accuracy, which corresponds to clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the authority's determination in complete. We will adhere to the directive as soon as the date and wording are finalised."
