A woodcut depicting the confirmation of
In Christianity, Confirmation is seen as the sealing of the covenant created in
Holy Baptism. Those being confirmed are known as confirmands. In some denominations, such as the
 confirmation bestows full membership in a local
congregation upon the recipient. In others, such as the Roman Catholic Church, Confirmation "renders the bond with the Church more perfect",
 because, while a baptized person is already a member,
 "reception of the sacrament of Confirmation is necessary for the completion of baptismal grace".
Eastern Orthodox, and
Oriental Orthodox Churches view Confirmation as a
sacrament. In the
East it is conferred immediately after
baptism. In the
West, this practice is followed when adults are baptized, but in the case of infants not in danger of death it is administered, ordinarily by a bishop, only when the child reaches the
age of reason or early adolescence. Among those Catholics who practice teen-aged Confirmation, the practice may be perceived, secondarily, as a "coming of age" rite.
Protestant denominations, such as the
Reformed Churches, Confirmation is a
rite that often includes a profession of
faith by an already
baptized person. It is also required by most Protestant denominations for full membership in the respective Church, in particular for traditional Protestant churches,
 in which it is also recognized secondarily as a
coming of age ceremony.
Confirmation is not practiced in
Anabaptist and other groups that teach
believer's baptism. Thus, the sacrament or rite of Confirmation is administered to those being received from those aforementioned groups, in addition to those converts from non-Christian religions, .
There is an analogous ceremony also called Confirmation in the
Jewish religion, which is not to be confused with
Bar or Bat Mitzvah. The early
Jewish Reformers instituted a ceremony where young Jews who are older than Bar Mitzvah age study both traditional and contemporary sources of
Jewish philosophy in order to learn what it means to be Jewish. The age instituted was older than that of Bar Mitzvah because some of these topics were considered too complicated for 13-year-old minds to grasp. Nowadays, Confirmation has gained widespread adherence among congregations affiliated with the
Reform movement, but has not gained as much traction in
Orthodox Jewish groups. The way Confirmation differs from Bar Mitzvah is that Confirmation is considered a more communal confirmation of one's being Jewish, and Bar Mitzvah is more of a personal confirmation of joining that
covenant (see below section about Confirmation in Judaism)