A church membership form is a document that contains a record of church members and their information. Editable Church Membership Certificate Template.Printable Certificate of Membership. Become a member of our church, and join us in our mission to spread the gospel. Fill out this Free Church Membership Form and join us! We have created a church membership form demo below that you can use to easily get started without any technical knowledge. This church membership form sample template is for church administrations, groups, or religious associations to enroll new members to the church. We have created a church membership form demo below that you can use to easily get started without any technical knowledge. With 123FormBuilder's membership form templates, you can easily add members to your club, church, gym, association, or other organization. This is crucial for church members, who may prefer to fill out forms on their mobile devices.