What action would you take?

[CelticTiger]

Originally Posted by RawAlex

Here's the deal. If you are 100% sure you are in the right, I would do this:

Find the truck again, take a picture (real film is better than digital for this).

Backup for psd files to two different forms of media for later reference.

Send them a registered letter with an invoice IN FULL for all work you have done. Indicate in the letter that you have all of the proof required by law to show that you are the creator of the image, and as such, you are willing to take all needed action (including collection and / or legal action) to get paid for you work. You will no longer accept "we won't use it anymore" as they have used it in public already. Make sure that they understand that they are liable for not only the original costs of the work, but ALL collection costs for payment, including any legal costs that may be incurred. As someone else has mentioned, than can run into the tens of thousands of dollars, and I am sure they would not want to lose that.
Alex

Well I followed your instructions to the "t" and lo and behold the guy called me up this morning apologising about the "misunderstanding" and said to call around today to pick up my check

Nice stuff Alex.