Is the marriage contract considered valid or void if the engagement and consent were obtained from the mother, her husband, and the girl's brother, then the contract was concluded in the presence of the mother's husband, my sister, and the girl's sister, knowing that there is documented approval from the country's ruler?

Marriage has conditions, including the guardian (wali), which is specific to males. The most entitled persons to give a woman in marriage are her father, then her paternal grandfather, then her son, then her full brother, then her half-brother (from the father's side), then their sons, then the paternal uncles. The guardianship of the girl's mother or her stepfather is not valid for her marriage. The half-brother (from the father's side) has valid guardianship if the father, paternal grandfather, or full brother are not present. The validity of the marriage depends on what occurred in the contract. If the contract was concluded with a legitimate guardian, the marriage is valid. If it was concluded without a guardian or with an authorization from someone who is not a legitimate guardian, the contract is invalid and must be renewed.