A Nonprofit Membership Form Template is a form template designed to streamline the membership process for nonprofit organizations. Online Membership Form for Nonprofits Template.And here's a template membership form for nonprofits, complete with tier level options. Check out these best practices, awesome examples, and a free template! Browse our list of nonprofit form templates and select the one that you need. Collect donations, register volunteers, or gather prayer requests. Communities make nonprofits what they are. Send out a user-friendly nonprofit membership form to expand your team and get new people involved. Become a NAMI Member. If you plan to submit your 501(c)(3) application, we invite you to join the Center and experience our Members-only benefits.