The British broadcaster engaged in a "serious breach" of industry standards by omitting to mention that the narrator of a programme about Gaza was the child of a Hamas official, as determined by regulatory body Ofcom.
An inquiry by the broadcasting watchdog into the programme Gaza: How to Survive a Warzone has concluded that the programme was "significantly deceptive".
The chief executive of the broadcaster had earlier expressed regret, stating there had been "a significant failing in relation to accuracy".
Ofcom has instructed the corporation to transmit a evening declaration about its decisions.
"Given this constitutes a significant violation of our code, we are ordering the BBC to air a statement of our findings against it on BBC2 at 21:00, with a schedule to be finalised," the statement read.
'Possibility to Damage Trust'
The authority's statement said: "The inquiry we conducted determined that the programme's lack of disclosure that the presenter's father occupied a position in the Hamas-administered government was materially misleading.
"Consequently that the public did not have vital facts which may have been very significant to their judgment of the voice and the details he provided.
"Trust is at the heart of the connection between a broadcaster and its viewers, particularly for a state-funded media outlet such as the public broadcaster.
"This oversight had the risk to erode the very considerable degrees of confidence that audiences 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 boy's family links came to light, and in the month of July an internal BBC review found it infringed the broadcaster's content policies on factual correctness.
A BBC spokesperson said: "The Ofcom ruling is in line with the results of the internal assessment, that there was a major oversight in the programme in relation to the corporation's content standards on factual correctness, which aligns with clause 2.2 of Ofcom's Broadcasting Code.
"We expressed regret for this and we comply with the regulator's ruling in complete. We will comply with the penalty as soon as the timing and wording are confirmed."
