Is the divorce issued in the form of "taliq, taliq, taliq" valid, and is it considered an irrevocable divorce, and is it obligatory to pay half of the dower after the girl's guardian relinquished it before the divorce?

If a woman is divorced before consummation, she is entitled to half of the stipulated mahr (dowry). However, if a valid khalwa (definition) (private seclusion) occurred between the spouses, she is entitled to the full mahr, based on the saying of the Rightly Guided Caliphs: "Whoever closes a door or lowers a curtain, the mahr becomes due, and the iddah (definition) (waiting period) becomes obligatory." The divorced woman may waive her share of the mahr if she is an adult of sound judgment, or the husband may pardon half of it and leave it for his divorced wife. As for a father waiving his daughter's right to the mahr without her knowledge and consent, it is invalid.