Suppose that a developer created an online back-office application, a database, and a UI for a startup business run by the developer's wife and a partner.
These items have a copyright notice in their footer giving the copyright holder as the business. But they do not have any terms and conditions (T&C) document listing the business as the owner.
The developer was never an employee of the business, was never paid for development services, and there was no written agreement of any sort between the developer and the business, specifically no copyright transfer or license agreement.
If the wife leaves the business can the developer insist on payment for having done this development work, or for the copyrights involved.
This is a follow up to my previous question here No written licence or any agreement between us at all.
Assume the developer designed the sites, but the content and the images were created by the business.