The Unamended Christadelphians are a "fellowship" within the broader Christadelphian movement worldwide, found only in the United States and Canada. They are, like all Christadelphians, millennialist and non-Trinitarian. The term Unamended Christadelphians is not the formal name of this community but is used informally to identify the grouping since a statement of faith traditionally used by many in this community is the "Unamended Statement of Faith". Similarly, most of the much larger grouping of Amended Christadelphians traditionally use a statement of faith that has been amended and therefore, in North America is known by the prefix "Amended". Nevertheless, Christadelphians worldwide and both Amended and Unamended Christadelphians in North America share fundamentally the same doctrines, with a few exceptions.
The name Christadelphian derives from the Koine Greek meaning “Brethren of Christ”. Like all Christadelphians, The Unamended Christadelphians’ have neither formal, ordained, or paid clergy.
In general the following description of doctrine is also true of all Christadelphians worldwide. The particular clauses relating to Christ's "condemned nature" and to the effects of baptism may be more distinctive to traditional Unamended Christadelphian positions in North America, though these are not held by all Unamended Christadelphians.
The Unamended Christadelphians’ understanding of the nature and person of Jesus Christ, the nature of man, and millennial expectations sets the group apart from the majority of Christian denominations.
Unamended Christadelphians are staunchly non-Trinitarian. The belief that Jesus Christ is not co-equal or co-eternal with but rather subordinate to God the Father is a fundamental doctrine. Furthermore, the Unamended Christadelphians maintain the Holy Spirit is not a distinct member of the Godhead, but the manifestation of God’s power. As such, these doctrines are contrary to the Nicene Creed. The group, while non-Trinitarian, are not adoptionists. The Unamended Christadelphians affirm a belief in the Virgin Birth of Jesus as the literal son of God and Mary.