Compared to matrimonial conception and forms current among existing religions, the Bahá’í conception of marriage is practically void of all ceremonies. There is no officiating priesthood. The two contracting parties simply appear before the Spiritual Assembly and express their desire to be united with the bonds of marriage. There is a short formula which they have to pronounce before the members, and a marriage certificate which they both have to sign. In the Cause we do not have what is commonly called the ‘Aqid‘. The appearance of the two parties before the Assembly has even only an Administrative importance. It carries with it no spiritual or sacramental obligation of significance. I mean only the mere act of appearing before the Assembly, not marriage itself which is of course essentially a spiritual and moral act of union.
(Shoghi Effendi, Lights of Guidance, p. 377)