Practice
In areas where those who practice believer's baptism are the physical or cultural majority, the ritual may function as a rite of passage by which the child is granted the status of an adult. Most denominations who practice believer's baptism also specify the mode of baptism, generally preferring immersion (in which the baptisand is lowered completely beneath the surface of a body of water) over affusion (in which water is sprinkled or poured over the baptisand). In the case of physical disability or inability to be totally submerged under water, as with the elderly, bedridden, and nearly dead, the pouring of water upon the baptismal candidate is acceptable to some despite the usual contention of credobaptists that unless there is immersion, the act cannot, by definition, be a baptism.[citation needed]
In some denominations, believer's baptism is a prerequisite to full church membership. This is generally the case with churches with a congregational form of church government. Persons who wish to become part of the church must undergo believer's baptism in that local body or another body whose baptism the local body honors. Typically, local churches will honor the baptism of another church, if that tradition is of similar faith and practice, or if not, then if the person was baptized (usually by immersion) subsequent to conversion.