This handbook is a companion to Community seed banks: concept and practice. Facilitator handbook (updated version) by Ronnie Vernooy, Bhuwon Sthapit, and Guy Bessette (Bioversity International 2020). The three booklets making up this handbook were written and designed for rural producers who are interested in establishing, supporting, and managing a community seed bank. Each focuses on a theme presented by the members of a community seed bank in Africa, Asia, and Latin America. The 2th Booklet introduces us to a number of technical issues concerning the operation of a community seed bank, including key principles and practices that will help you along the way. Every community seed bank requires members who have mastered key technical aspects.