I cancelled a cruise a week before sail date. All the costs except for insurance cost, fare and administrative fees were reimbursed to one of the credit cards I had on file. I received a cancellation invoice showing the fare and administrative costs. I submitted the cancellation invoice to insurance and received payment within two weeks. I used two cruise next certificates and the value of the certs was included in the fare costs. The two certs were not returned to my account. I don't know if it will work the same way with a CASNext certificate.