After the wedding our officiant gave us a copy of the certificate Cook County gave us with everything filled in for our records. He said he would mail in the original. What I am confused about was that he also had our best man and matron of honor sign a different certificate of marriage. I remember doing this at my sister's wedding. What I am confused about is that he gave this signed certificate to me and my husband and didn't tell us what we needed to do with it. Are we supposed to mail this in or bring it with when we go to get our copy after the wedding?