If this is one of your first commercial sales, and he is NOT going to SELL the posters, you may wish to charge him a nominal fee for his limited use of the image just for the FREE posters which includes ADDING your name on the image followed by (c) 2012.

That provides some free name recognition and publicity for you, you meet his immediate need, and perhaps open the door for other opportunities with him (or other racers.) Seems like a win-win for both of you if negociated right and in good faith. If you get too carried away with legally securing your ownership of the image he may just go elsewhere. Just limit its use for a a nominal fee and hope he abides by that agreement. Form a relationship, not a transactional contract.

Getting your name out there in a positive way is far more valuable than going overboard to protect one image with a lot of paperwork. By definition, it is already your work and getting a copyright does not prevent unauthorized use. IMHO.

Hi Bruce,
Thank you and this is a small, delicate bird that usually congregate in flocks??(is that the right terminology)

A very beautiful bird. I do not know of and like it in the states. The Gold Finch on this side of the pond is mostly yellow with some black. Thanks for sharing.

Goldfinch