The BBC was found to have committed a "major breach" of broadcasting rules by failing to disclose that the presenter of a documentary about the Gaza conflict was the son of a Hamas representative, as determined by regulatory body Ofcom.
An investigation by the media regulator into the programme Gaza: How to Survive a Warzone has determined that the film was "materially misleading".
The BBC's director general had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
Ofcom has instructed the corporation to air a evening announcement about its decisions.
"Given this constitutes a major infringement of our rules, we are ordering the broadcaster to broadcast a announcement of our conclusions against it on BBC Two at nine o'clock in the evening, with a timing to be confirmed," it said.
'Risk to Damage Credibility'
The authority's statement declared: "Our probe found that the documentary's failure to disclose that the presenter's parent occupied a role in the Hamas-administered authority was significantly deceptive.
"It meant that the viewers did not have essential details which may have been highly relevant to their assessment of the presenter and the details he provided.
"Credibility is at the core of the connection between a television network and its public, especially for a public service broadcaster such as the British Broadcasting Corporation.
"This failing had the risk to erode the significantly high amounts of trust that the public would have placed in a documentary produced by the BBC about the Israel-Gaza war."
The programme was pulled from iPlayer in February after the narrator's familial connections emerged, and in July an internal BBC review found it breached the broadcaster's editorial guidelines on truthfulness.
A BBC spokesperson commented: "The regulator's decision is in line with the findings of the internal assessment, that there was a major oversight in the programme in relation to the BBC's Editorial Guidelines on factual correctness, which corresponds to clause 2.2 of Ofcom's Broadcasting Code.
"We have apologised for this and we comply with the regulator's ruling in its entirety. We will follow the directive as soon as the date and language are confirmed."
