You should see fit to take extra steps to protect any contributions received via paypal. Since you will not be shipping anything, paypal WILL SIDE WITH BUYER if they try to reverse their contribution. You have absolutely no recourse or protection of the funds in your account unless you actually send an item, receive a tracking number and can prove to paypal via 3rd party evidence that you sent an item. Anything that wasn't shipped, you will lose the dispute if a buyer tries to reverse. This could be especially problematic if you already spent the money, then were hit with several reversals. Good luck in your non-profit event, and hopefully you find a proper alternative.
