The BBC committed a "significant breach" of media regulations by not revealing that the voice of a documentary about Gaza was the child of a Hamas representative, as determined by regulatory body Ofcom.
An probe by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the documentary was "materially misleading".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to factual correctness".
The authority has directed the broadcaster to broadcast a peak-time declaration about its conclusions.
"Since this amounts to a major infringement of our regulations, we are ordering the BBC to air a statement of our findings against it on the BBC's second channel at 9pm, with a date to be finalised," the statement read.
'Risk to Damage Credibility'
The regulator's announcement declared: "The inquiry we conducted found that the film's omission to reveal that the presenter's parent occupied a role in the Hamas-administered government was materially misleading.
"Consequently that the viewers did not have vital facts which may have been highly relevant to their assessment of the voice and the information he presented.
"Credibility is at the core of the relationship between a broadcaster and its public, especially for a public service broadcaster such as the BBC.
"This oversight had the possibility to damage the significantly high amounts of credibility that viewers would have placed in a factual film from the broadcaster about the conflict in Gaza."
The film was pulled from iPlayer in February after the presenter's familial connections emerged, and in the month of July an corporation's own inquiry concluded it infringed the corporation's content policies on factual correctness.
A representative for the broadcaster commented: "The regulator's decision is in accordance with the findings of Peter Johnston's review, that there was a major oversight in the film in relation to the broadcaster's journalistic policies on factual correctness, which corresponds to regulation 2.2 of the regulator's media standards.
"We expressed regret for this and we comply with the regulator's ruling in its entirety. We will follow the penalty as soon as the schedule and wording are determined."