The BBC was found to have committed a "serious breach" of media regulations by not revealing that the narrator of a film about the Gaza situation was the child of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by Ofcom into Gaza: How to Survive a Warzone has concluded that the programme was "materially misleading".
The BBC's director general had previously apologised, stating there had been "a major oversight in relation to factual correctness".
The regulator has directed the BBC to transmit a prime-time statement about its decisions.
"Given this constitutes a significant violation of our regulations, we are directing the BBC to transmit a message of our determinations against it on BBC Two at 21:00, with a date to be determined," it said.
'Potential to Undermine Credibility'
The watchdog's report declared: "Our investigation determined that the film's omission to reveal that the voice's parent held a post in the Hamas-administered authority was substantially inaccurate.
"This implied that the viewers did not have vital facts which may have been extremely pertinent to their evaluation of the narrator and the information he presented.
"Trust is at the core of the relationship between a television network and its public, particularly for a national broadcasting corporation such as the public broadcaster.
"This oversight had the possibility to damage the very considerable degrees of credibility that audiences would have invested in a BBC factual programme about the conflict in Gaza."
The programme was pulled from the online platform in the month of February after the boy's personal associations came to light, and in this past July an internal BBC review concluded it violated the broadcaster's content policies on truthfulness.
A corporation official said: "The authority's determination is in accordance with the findings of Peter Johnston's review, that there was a major oversight 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 issued an apology for this and we comply with Ofcom's decision in full. We will comply with the penalty as soon as the schedule and language are determined."
