There are very few events that could happen to a person that could affect the people surrounding a person even if the affected person was not yet born during the time of the happening of that event. One of these events is the act of getting married, for marriage is something that changes the status of a person, and status is something that would affect everyone around the person whose status had changed. Status, after all, could define rights and obligations that are binding upon the whole world, at the same time that it could define the rights of a person who is not yet born, such as any subsequent child of that marriage. It is for this reason that marriage records like Clayton County Marriage Records are very important.
Marriage records like Marriage Records Clayton County enjoy the presumption of regularity because it is the government that makes and keeps these records. Of course, the original copies of the records would never be made available for take home to any person, but they are available for perusal by anybody, and they could be copies. Once copies and certified by the authorized authority, then the copies are almost as good as the originals, and many jurisdictions would not even inquire as to the contents of the records once it could be proven to exist.