I think there may be a misunderstanding here.
I'm not asking whether Orthodox Priests can perform the Orthodox sacrament of marriage with non-Orthodox.
I'm asking whether the Orthodox Priest could perform a "civil marriage" for a couple that is non-Orthodox.
Take this example:
A Priest has a family member, a cousin, who wants the Priest to marry him and his fiance. However, the Priest's cousin and his fiance aren't Orthodox. They ask the Priest to marry them, but not in an Orthodox service.
Is it allowed for the Priest to "marry" the couple, and then sign the marriage certificate?
Here in Missouri, one only has to be "licensed" by the State to marry a couple. It isn't a "governmental" job, simply a license given by the government, permission by the government to perform the marriage.
The person who is licensed has to sign two marriage certificates, along with the couple, and two additional witnesses.
The person performing the service takes the first certificate and submits it to the state, and the couple takes the other and submits it to the government to receive their "official" certificate. (which allows the wife to change her name and their legal status as a married couple)
So basically, all Orthodox Priests who marry couples in the state of Missouri have to be licensed in order for the marriage to be "valid" in the eyes of the state.
That being the case, I was simply wondering if an Orthodox Priest can "marry" a non-Orthodox couple in a non-Orthodox ceremony.