You can convert registration transactions to donation transactions (allowing an organization to keep the funds, but remove the registration) through the following steps:

  1. Go to Communities > Special Events > Friends Asking Friends > Kintera Thon
  2. Mouse over the event and click on Bookkeeping
  3. Locate the participant and click Edit next to their entry
  4. Click on the "Convert Registration to Donation" link under the View Contact button
Note: you cannot convert $0 registrations to donations. Deleting $0 registrations records from the event will remove these registration transactions.