In addition to the undesignated individual memberships, the club offers seven designated membership categories.
Enlistment credit is given in each category.
Memorial memberships provide a way to honor the memory of those who have died. The donor is placed on the club mailing list and is invited to attend all C-400 functions. Honor roll memberships pay tribute to the living and are often given by parents to children, children to parents, congregations to pastors, or to anyone a donor wishes to recognize. Some donors prefer to remain anonymous. Group Division memberships make it possible for a congregation, women's or men's organization within the church, or other auxiliary groups to join C-400 as a unit in support of Concordia.