Membership was not reciprocal, becoming so today. The Dictionary Will Shed Light On The Concept Of Confirm And Confirmation.
Confirmation is another ordinance practiced by the biblical church and now is practiced by few.
When Jesus formed what appeared to be another Jewish sect with its own leadership and laws the following were required for membership, faith, repentance, baptism, and confirmation into the church by the laying on of hands. Membership in other Jewish churches was not acceptable in The Church of Jesus Christ. Membership was not reciprocal then and generally not accepted today. This had to do with what they believed. There were and still are many similarities between the Jewish denominations and the one Jesus formed at that time.