Que es lo que necesito para casarme por el civil con un immigrante

We can help best if you ask the question in English.

Translation: "What do I need information I need to get married civilly with an immigrant"

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"What do I need information I need to get married civilly with an immigrant"

The OP wants to know what information and documentation he will need to marry an immigrant? That would depend on what state/country he is in. Marriage license applications require various things, depening on jurisdiction.