Click the "Register" button on the form below to start the registration process.
You will be prompted to Sign Up by creating a user account on the Mightycause platform. Please complete all required fields (email, password, first name, last name).
Once you are logged in, start by selecting the "Can't find your organization? Create it now." option on the bottom of the registration form.
Complete the New Organization Application by providing information about your organization type (501c3 Nonprofit, Church or Religious Organization, Public School, Government Entity) and your organizations EIN/code (unique EIN, EIN belongs to national/central organization, EIN belongs to fiscal sponsor).
- Fiscally sponsored organizations should be prepared to provide the Mightycause team with a Memorandum of Understanding/Letter between the fiscal sponsor and the sponsored organization that includes the following:
  1. Approval for the sponsored organization to use the sponsoring organization’s EIN for tax purposes, including a signature from both entities.
  2. The letter needs to be on the sponsoring organization’s letterhead with its address and EIN.
  3. The letter needs to include the fiscally sponsored organization’s name and address. If you’d like to receive the funds directly to the sponsored organization’s office, you will want to include the sponsoring organization’s authorization in the letter stating this.
  4. The letter can contain other pieces of information that the organizations agree are important as well, per your discretion.
- Chapters of a larger/national organization should be prepared to provide the Mightycause team with the following documents:
  1. Copy of group exemption letter which was issued to the central organization.
  2. List of subordinate organizations covered by central organization’s group exemption, or written statement from the financial office of the central organization. The document must contain the registered name, address and EIN of the subordinate organization.
The Mightycause support team will review your New Organization Application once it has been submitted. If the information you submitted is complete and accurate, they will assist in creating your unique organization page on the Mightycause platform. If additional information is required, they will contact you at the email address you provided.
Once this has been completed, the Mightycause support team will contact you letting you know that you can register this organization page to participate in Giving Day 2026.

Giving Day Registration