If the person is a minor still living at home, the pastor should also seek the involvement and the counsel of the parent or guardians. After the believer is baptized, the pastor should offer him or her continuing discipleship training so that the new Christian may grow in the grace and knowledge of their Lord and Savior. A degree of maturity is needed, but we should keep in mind that Scripture does not set forth adult maturity as a criterion for baptism. Apparently, Daniel, David and Samuel were among those God called while they were still in their teen years. Polycarp, the disciple of John, was apparently baptized before he was a teen.
Some teenagers profess faith and then eventually fall away.
Perhaps their original profession was not genuine. That happens with adults, too, no matter whether they are 20 years old or 60 years old. Age alone is not what guarantees sincerity. Pastors should discuss the matter with each person to ensure that the person understands that he or she is a sinner in need of salvation, the person knows that Jesus Christ paid the penalty of sin for him or her, the person has repented of his or her sin, and the person accepts Jesus Christ as his or her own Savior. The controversy over the age of baptism need not become a conflict in our fellowship.