Back in '07 when I was new to photography, I photographed a woman and her band and allowed her to use the photos on Myspace. This was before I charged money for photography or knew much about the business, so there was no contract or fees. I just said she could use the photos.
Fast forward to today. It's a long ugly story which I won't bore you with, but I no longer want her to use any of my photos. However, I've learned she's using at least one of them on Facebook. Since I still own the copyright, can I simply write her and revoke permission to use my work? Should I sent a certified letter? What if she refuses? Is it time to get a copyright attorney?
There's not an issue of money since there was never any agreement to pay me for the work. I'm also not losing any money by her using the photos. I simply don't want to be associated with her in any way and therefore don't want her to use my photos.