I work as a graphic designer in a big European (but not E.U.) public establishment with two fellow designers.
We have a corporate communications coordinator, which usually deals with all kinds of stuff including "managing" the design process, but it usually fails. S/he usually requests and pays for "designing a poster" to an external agency and then asks for its source files so that we can adapt that "design" to some other mediums such as creating a billboard, social media images, brochures or even "converting" it in our own language (when it's designed in English) and even some revisions of the original work.
I'm suspecting that rather than paying for these revisions or adaptations to the external agency, our management tries to take advantage of us, being a some-kind-of public official, who they think will be obey their "orders".
Is it legal or ethical to do something like that? I don't think it is legal, ethical and even can't be classified as a "designers job" to edit someone else's work. I will be refusing to work on such projects officially but I can't manage to find any similar experiences on web.
I'm planning to ask for an official consent of the external agency that they are aware of someone is using their work to create such derivations. I will also ask for the official agreement between our firm and the agency to see if there is any stated information about "modified work".
What other things can I present to our general managers (which are hierarchically on top of this coordinator and its supervisor) to reject this kind of project?