Once you've actively started processing with Clearent, this process will be applicable. You will receive a physical letter in the mail as well as an email from Merlink. DO NOT IGNORE THIS. You will need to respond to the dispute through the portal mentioned on the mail or you can physically mail items. Keep in mind disputes are time senstive! So respond to them as soon as you get them. 

You should include anything that will help you win the dispute, this would include your cancellation policy, invoice and signature, patient photos, patient notes, booking history etc.