Remarrying the same person after Khula
Khula (annulment of marriage) is like Talaaq-e-Baain (irrevocable divorce). Thus, after Khula, the marriage between the husband and the wife ends. If they want to remarry, then with a new Mehr (alimony) and in the presence of 2 witnesses, they can do so. This can be done within the Iddah (waiting period) or after it. As given in Bahr Ur Raaiq, Babul Khula.