I had similar problems in Poland but this is not about me
Just found this story on motionographer site, story of one Freelance artist and problems in one of LA studios. This is good advice for all freelancers, how to start cooperation and how to ract when there is something wrong.

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I don?t write this to intentionally bash the company, but more to make other artists aware of what their legal rights are and what you can do when a company attempts to do you wrong.

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Read whole story HERE