When file encryption ends, CZIP X shows a confirmation message with some optionally actions and information to user about the archive. If you want, you can save those data in a report that can be saved as a .TXT file.
WARNING! Saving a report doesn't apply any legal relevance to that file or to its contents. It won't be a proof in any judicial trial. If you want to give legal relevance to that report, you should consider to apply a digital signature.