The BBC engaged in a "major breach" of media regulations by omitting to mention that the presenter of a documentary about Gaza was the child of a Hamas representative, as determined by regulatory body Ofcom.
An inquiry by Ofcom into the documentary titled Gaza: How to Survive a Warzone has concluded that the programme was "substantially inaccurate".
The BBC's director general had previously apologised, noting there had been "a significant failing in relation to accuracy".
The authority has ordered the BBC to air a evening statement about its findings.
"Since this amounts to a serious breach of our rules, we are ordering the corporation to broadcast a announcement of our findings against it on BBC2 at 9pm, with a date to be finalised," the statement read.
'Possibility to Damage Credibility'
The watchdog's announcement stated: "Our investigation found that the programme's lack of disclosure that the presenter's parent held a role in the Hamas-run administration was substantially inaccurate.
"This implied that the public did not have vital facts which may have been highly relevant to their evaluation of the narrator and the information he presented.
"Confidence is at the center of the connection between a media organization and its public, notably for a national broadcasting corporation such as the public broadcaster.
"This error had the risk to erode the very considerable amounts of credibility that viewers would have invested in a factual film from the broadcaster about the Gaza conflict."
The documentary was removed from the BBC's streaming service in February after the presenter's personal associations were revealed, and in this past July an broadcaster's internal assessment found it violated the broadcaster's content policies on accuracy.
A corporation official said: "The authority's determination is in agreement with the findings of the internal assessment, that there was a significant failing in the film in relation to the BBC's Editorial Guidelines on truthfulness, which reflects clause 2.2 of the authority's broadcasting regulations.
"We issued an apology for this and we agree with Ofcom's decision in full. We will follow the directive as soon as the date and language are confirmed."
