What is a Marriage Commissioner? It is a civil wedding officiant. Alberta has two kinds of ceremonies - religious or civil. A religious service would be performed by a registered religious marriage officiant (eg pastor, priest etc). A civil service is performed by an appointed marriage commissioner. Both are equally legal in Alberta. The choice is yours. You can have religious content (such as hymns and/or religious readings) in your civil ceremony if you wish, but somebody other than myself has to perform them.