A casket is not necessary for all memorial services. If you're opting for a traditional burial, then a casket is required. If you are having a funeral service prior to cremation and want to have the deceased present in an open or closed casket, then you'll have to purchase or rent one. If you're having a direct cremation or a cremation followed by a memorial service, a casket is not typically required. You will, however, need to choose at least one urn for displaying and storing the cremated remains. This is necessary even if you plan to scatter the ashes following the memorial service.