The art you'll receive is only for personal purposes.
You can post the received art in any site, with the proper credit. Never claim the commissioned artwork as yours, please!
You will receive a digital file of the art you commissioned/requested/etc. I won't send you a printed version!
If I forgot any detail I can do small changes once the picture is finished. If the reference was unclear or you forgot to mention something on the form, I will do it only if I am paid an extra since I have not been responsible for the error.