A Nonprofit Membership Form Template is a form template designed to streamline the membership process for nonprofit organizations. Membership Application - Operating Nonprofit.Fill out the form below to apply for or renew your Forefront Membership online and pay using your credit card. You'll need to fill out Form REG1: Illinois Business Registration Application. 12. Obtain 501c Tax-Exempt Status. Forms on this website are PDF forms with fillable fields. The forms should be downloaded to your computer before filling in the fields. This document is sometimes referred to as the charter. Online Membership Form for Nonprofits Template. And here's a template membership form for nonprofits, complete with tier level options.