Does the marriage become void if the brother officiates the marriage contract without informing the absent father, given that the father works in Saudi Arabia and cannot attend due to time constraints?

If the father is not preventing her marriage, then it is not permissible for the brother or anyone else to marry off the girl without a proxy from her father. If the brother marries her off and the father consents, there is a difference of opinion among scholars regarding the validity of the contract. The prevailing view is that the contract is invalid unless the guardian approves it. Some scholars hold that it is valid and contingent upon the guardian's approval. It must be noted that boycotting the father is impermissible, as honoring him and accompanying him with kindness are obligatory.