All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.
Khul’ has some pillars without which it is invalid, among which is the consent of both parties – i.e. the husband and the wife – with the exception of some cases like the Khul’ issued by the arbitrators as stated by the jurists .
Therefore, if this document denotes that this woman has divorced her husband, then divorce is in the hands of the husband as clarified in Fatwa 86780; this is the principle, and the wife is not entitled to issue divorce unless the husband had given her permission to divorce herself from him; there are certain conditions for this.
Since we neither know the content of this document nor the authority who issued it, then we cannot authoritatively assert whether or not the marriage bond is still valid. But in principle, it is still valid as it is known.
Therefore, we advise you to consult the trustworthy Islamic organizations such as the Islamic Centers and the like. For more benefit on the rulings on Khul’, please refer to Fatwa 89039.
If that woman is still the wife of that husband, then it is not permissible for her to marry another man; if she does so, it will be a void marriage. Among the impediments of marriage is that the woman is still the wife of her husband; as Allaah Says about the women whom one is prohibited from marrying (what means): {And [also prohibited to you are all] married women.}[Quran 4:24]
Hence, the first marriage remains in its original state which is validity as we have already discussed.
On the other hand, if the husband is able to be just (between two wives), then it is permissible for him to marry a second wife and he is not obliged to seek the permission of his first wife as we have already clarified in Fataawa 85948 and 84411.
Finally, we would like to point out to the two following matters:
1- The wife is obliged to obey her husband in what is permissible.
2- It is not permissible for the wife to go out of her husband’s home without his permission otherwise she is Naashiz (recalcitrant). For more benefit on how to treat a recalcitrant wife, please refer to Fatwa 85402.
Allaah Knows best.