common law marriage

[eisonmatt]

What is the name of your state?ga
If a common law marriage was begun 21 years ago, is it necessary to complete a full divorce, and if so how? And what happens if the judge asks for a marriage certificate?

 

[JETX]

What is the name of your state?ga
If a common law marriage was begun 21 years ago, is it necessary to complete a full divorce

Yep.

and if so how?

Just like any other.
http://www.georgiadivorce.net/divorce-process.html

And what happens if the judge asks for a marriage certificate?

You simply explain that it was a common law marriage.