Can siblings marry in Thailand?

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Can siblings marry in Thailand?

Prohibited Degrees of Relationship

According to Thai family law, marriages between close relatives are forbidden. This includes relationships where the man and woman are blood relatives under the direct ascendant or descendant line, or brother or sister of full or half blood. If a marriage takes place contrary to this provision, the court will rule that the marriage is void. The law also prohibits marriages between adopter and adopted individuals. Any marriage that violates this provision will result in the dissolution of the adoption.

Expert Opinion

As an expert in family law in Thailand, I can confirm that siblings are not allowed to marry under Thai law. This prohibition is in place to prevent potential genetic issues that may arise from such close relationships. It is important to adhere to these regulations to ensure the legality and validity of marriages in Thailand.


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