What is the method for referring the matter of the primary problematic individual, who swore to having committed grave sins ignorantly in his childhood and does not know whether he was an adult or not, to the authority entrusted with applying the death penalty to him, taking into consideration that he has been suffering severe psychological distress for over 16 years because of these sins?

We advise the questioner to turn to Allah Almighty with supplication and humility, and to completely disregard thinking about the aforementioned matter, because it does not necessitate a Hadd (prescribed punishment). Even if we assume it did, there is no certainty that it occurred after puberty. Concealing one's own faults is legally (religiously) required, and she is not obliged to confess. If she is distressed by those who committed that act or knew about it, she should seek a way to emigrate from the country where she resides.