Is a khul' valid if it occurs without the husband's knowledge of a pregnancy, or without witnesses, or without it being finalized in court?

Khul' (divorce initiated by the wife) occurs through offer and acceptance between the spouses. Its validity is not hindered by the wife being pregnant, menstruating, or in a state of purity after intercourse. Neither witnesses nor a judge's ruling are conditions for khul'. However, if the spouses dispute the occurrence of khul', then testimony is needed to prove it. Documenting khul' in the courts is essential for safeguarding rights.