The BBC was found to have committed a "serious breach" of broadcasting rules by omitting to mention that the voice of a programme about the Gaza conflict was the son of a Hamas administrator, as determined by British broadcasting authority Ofcom.
An probe by the broadcasting watchdog into Gaza: How to Survive a Warzone has found that the film was "materially misleading".
The BBC's director general had earlier expressed regret, noting there had been "a major oversight in relation to accuracy".
The authority has ordered the corporation to transmit a evening statement about its decisions.
"Given this constitutes a major infringement of our rules, we are ordering the broadcaster to air a message of our findings against it on BBC Two at nine o'clock in the evening, with a timing to be confirmed," the statement read.
'Potential to Damage Confidence'
The watchdog's announcement said: "Our probe concluded that the programme's failure to disclose that the presenter's father occupied a post in the Hamas-administered government was significantly deceptive.
"It meant that the audience did not have vital facts which may have been extremely pertinent to their assessment of the narrator and the information he provided.
"Confidence is at the core of the connection between a broadcaster and its public, notably for a national broadcasting corporation such as the British Broadcasting Corporation.
"This oversight had the risk to erode the exceptionally strong amounts of credibility that the public would have placed in a factual film from the broadcaster about the Gaza conflict."
The film was pulled from the BBC's streaming service in February after the boy's familial connections were revealed, and in this past July an broadcaster's internal assessment determined it infringed the broadcaster's journalistic standards on factual correctness.
A representative for the broadcaster stated: "The authority's determination is in accordance with the results of the corporation's inquiry, that there was a significant failing in the film in relation to the corporation's content standards on accuracy, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we agree with the regulator's ruling in complete. We will follow the sanction as soon as the timing and wording are determined."
