How valid is the ruling regarding the waiting period ('iddah) of three menstrual cycles for a consummated marriage that was not followed by intercourse, and is the waiting period recorded in the divorce certificate, and is it permissible to request its amendment?

If a husband secludes himself with his wife in a valid seclusion, the 'iddah becomes obligatory upon her. This is because seclusion takes the place of consummation in making the 'iddah obligatory and completing the mahr. The calculation of the 'iddah begins as soon as the final divorce ruling is issued by the judge, even if the divorce decree has not yet been received.