So how does it work in a SBC church if non-baptized members want to attend? Are they considered “guests”, including the children of parish members? Can they fully participate in the services? Does the SBC accept baptisms from other Christian denominations are valid? How about other baptists? Do they have to re-baptize someone who’s already been baptized in another denomiantion to make them an SBC member?
They are attendees, and may be on the church attendance roll, but are not members of the church. When they give their Profession of Faith and are baptized it is often referred to as “joining the church.” They can fully participate in the services but are not to take The Lord’s Supper (communion). Membership can be moved by letter (the church where they previously were a member sending notice to the new church), or by Statement of Faith to affirm they have accepted Christ and were baptized from another SBC church. It depends on the individual church if this will be accepted from another denomination - some are not comfortable doing this but others will if the faith tradition has a similar doctrine of Believer’s Baptism.