I don't know if it helps

but here's what I found on the web:
A marriage license is the document that authorizes you to get married and a marriage certificate is the document that proves you are married.
Typically, couples obtain a marriage license, have the wedding ceremony, and then have the person who performed the ceremony file a marriage certificate in the appropriate county office within a few days. This may be the office of the County Clerk, Recorder or Registrar of Vital Statistics, depending on where you live. The married couple will be sent a certified copy of the marriage certificate within a few weeks after the marriage ceremony. Most states require both spouses, the person who officiated and one or two witnesses to sign the marriage certificate; often this is done just after the ceremony. In most cases, a marriage license may never be used outside the state in which it was issued, and a license issued in another state may never be used.
Usually, you may apply for a marriage license at any County Clerk's office in the state where you want to be married. Be sure to contact the office of the County Clerk, Recorder or Registrar well in advance of the wedding to find out on what days and during what hours they will be in the office. In some circumstances, you must apply in the county or town where you intend to be married - this depends on state law. You'll probably have to pay a fee for your license, and you may also have to wait a few days before it is issued. In most states you need a photo ID and in some cases a birth certificate may be requested for proof of age and parentage. If one or both applicants are divorced, you should bring a copy of the final decree or decrees for examination or a statement by the judge as to when the final decree was signed. In some states, even after you get your license you'll have to wait a short period of time before the marriage, but if you wait too long, your license will expire. Licenses are good for 30 days to up to one year, depending on the state. If your license expires before you get married, you can apply for a new one.