1. Through the Civil Affairs Bureau, when applying for marriage registration, the bureau will inquire about the marital status of both parties and conduct a search;
2. Ask me, the other party will truthfully disclose their marital status in a sincere manner;
3. Inquire with family and friends, as their parents and friends around them usually have a clear understanding of their personal situation;
4. Inquire with neighbors, as neighbors, one usually has a clear understanding of their daily life information.
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