On the left-hand side of the site (main menus), click your Users
From the Users page, click “Invite User”
You will be presented with a pop-up window. Enter and select your organization on the first search bar. Check off "Raffle Manager" and "Invoice Validator" to give the user access to the dashboard and validate an invoice. Finally, enter their e-mail address at the bottom and click "OK". The user will be sent an e-mail with instructions on how to register.
With this step complete, your organization will now have 2 types of user profiles, one whom can validate the Invoice and manage raffles. Plus one user who can Authorize and Pay an invoice as well as being the full administrator of the Organization account.