Each organization hosting their registration form on Zone4 has different policies regarding what you can or can’t change after you complete your registration. Some may charge you an administrative fee, or a transfer fee.
At the top of the receipt that was emailed to you upon registration, you’ll see a link to the contact information for the organizer of that club or event. If you need to make any changes, please contact them.
For example, see the highlighted section below on this receipt for the Windsor Park trails: