Changing one's lineage in order to obtain nationality of a state for certain benefits

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He married her then he found out that her name was false
Taking a family name other than that of one's father (or attributing oneself to someone other than one's father)

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He married her then he found out that her name was false
Taking a family name other than that of one's father (or attributing oneself to someone other than one's father)

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