I was wondering if anyone can help me locate some software. I sell stock images which clients purchase with a license of 3 months. Once that period expires we expect them to re buy the license. Obviously this doesn't happen very often because the client already has the image. They are aerial shots and are usually for the real estate market. The estate agency will add arrows to point to a particular house but what I'm seeing more and more of is, if another house goes for sale on that same street, years later then the same image is re used with the previous arrow photoshopped out (badly) and a new one pointing somewhere else.
So, my question is:
Does a software package exist that lets you edit the metadata with a time limit? So that the image will expire after three months and the client will have no choice but to re purchase the license? We use Jpeg formats but would be willing to change if this feature could be added.