What is the ruling of Islamic law regarding the marriage of a Muslim man to a European Christian woman, which took place with their mutual consent and acceptance, seeking Allah's testimony? Is this marriage considered valid according to Islamic law? If so, how is a divorce effected? And is the woman considered a legitimate wife with full rights and inheritance?

First, one must repent to Allah for undertaking an action without knowing its legal ruling. The aforementioned marriage is invalid due to the absence of its essential pillars and conditions. However, jurists have stipulated that an invalid marriage about which there is disagreement, once consummated, entails the effects of a valid marriage. A marriage without a guardian (wali) or witnesses is a matter of dispute among scholars. The child born from such a marriage is affiliated with it, and paternity, waiting period (iddah), and inheritance are established before annulment. Separation in this marriage occurs through divorce, or the judge may separate them if the husband refuses.