I too was contacted by a puppeteer named Joseph Sirrico to create some graphic tees. I can't attest to the honor of his request, but when asked for details in order for me to itemize an invoice, he replied with a very vague "December" and then didn't reply again. Needless to say that lack of professionalism ended my involvement in any potential project. I'm not sure if this is the same incident being discussed here, but be careful.
I too am a working artist. Even though we all sometimes provide free work for friends - that decision comes from us and is not something that should be requested. Thanks to another forum member for warning me about the potential of this situation. When someone asks for your services, no matter how kind and flattering they are, get details, dates and something in writing. That's often when communication breaks apart. And if you get a suspicious feeling, even with the potential of a contract, follow your gut instinct!