Job Recruitment Website - Ranking of immigration countries - Do American immigrants need the marriage notarization of their relatives when scheduling?

Do American immigrants need the marriage notarization of their relatives when scheduling?

No, but if your uncle is divorced, the information about the previous marriage should be prepared, and the immigration office may ask you for it. Because my friend applied for her sister's F4 immigration, she (the guarantor) was divorced once before, and now the Immigration Bureau wants her to show the proof of her first marriage (she was married in a county in Guangdong before, but now the marriage certificate can't be found). She has lost contact with her ex-husband, so it is very troublesome to write a letter to the Immigration Bureau, and I don't know whether to accept her explanation.