I am fairly new at graphic design and I have just finished creating a logo and marketing materials for a client. I only intended for the images to be used for marketing and advertising of their business, but I'm wondering what kind of rights I have if they randomly decide to try and sell products with the logo.
Is there any way to give my client the rights to use the images for anything they want unless it involves selling items with my designs? If they started selling t-shirts or something, would it be inappropriate to ask for royalties? I keep reading that it is appropriate in this situation to sign over all of the rights to my client since it is their branding materials, but I just don't understand. Has anyone ever had experience with this?
We don't have any sort of contract at the moment (which I now know was a mistake), and I can't seem to find the answer to this question anywhere.