The BBC was found to have committed a "serious breach" of industry standards by omitting to mention that the narrator of a programme about the Gaza conflict was the offspring of a Hamas official, as ruled by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the documentary titled Gaza: How to Survive a Warzone has determined that the documentary was "materially misleading".
The head of the BBC had already issued an apology, stating there had been "a significant failing in relation to truthfulness".
The regulator has ordered the BBC to air a evening declaration about its conclusions.
"Since this amounts to a serious breach of our rules, we are instructing the BBC to broadcast a statement of our determinations against it on BBC2 at nine o'clock in the evening, with a timing to be finalised," the regulator stated.
'Risk to Damage Confidence'
The regulator's announcement stated: "Our probe determined that the programme's omission to reveal that the voice's male guardian occupied a position in the Hamas-run government was materially misleading.
"This implied that the viewers did not have vital facts which may have been very significant to their evaluation of the narrator and the content he shared.
"Trust is at the core of the bond between a broadcaster and its audience, notably for a national broadcasting corporation such as the public broadcaster.
"This oversight had the risk to damage the exceptionally strong degrees of credibility that the public would have put in a documentary produced by the BBC about the conflict in Gaza."
The programme was pulled from iPlayer in the month of February after the presenter's familial connections were revealed, and in July an broadcaster's internal assessment determined it violated the broadcaster's content policies on accuracy.
A corporation official stated: "The regulator's decision is in line with the findings of the internal assessment, that there was a major oversight in the documentary in relation to the corporation's content standards on factual correctness, which reflects clause 2.2 of the regulator's media standards.
"We have apologised for this and we comply with the regulator's ruling in complete. We will comply with the penalty as soon as the date and language are determined."