I'm sometimes giving small adverts that I created in ID CS5 to a local newspaper. They are building their stuff in Corel. They usually want me to either give them an image (as in jpg) or a pdf file. They don't know what to do with the InDesign file. I've got the feeling that they are actually recreating my stuff in their program, which I don't like at all.
Is there a common file format that both programs can read (or that mine can write, at least)? I don't want them to redo my work, which wastes their time and is error-prone.