I noticed today that many of you are using elements or images from design sources (I do too) and these sources usually require giving credit.  I do this too, but here are some things to think about.
 
Providing credit in the Image By is not a great idea.  First of all it gives the appearance of providing a link because this is an active link text, which some of them suggest as a way to provide credit...however this not only does not link to them, it does not stay with the card when printed which is critical.
 
What I suggest you do is that you ALWAYS add a Photo Courtesy of.... in very small print somewhere on the actual image (don't use .com, just the name of the person or site).  Then also put this same statement at the end of your Artist's Note section.  This method makes sure that if the copyright holder of that image ever sees it in printed form, they see proper credit and if they find it on the site, they see the credit given in your artist's notes.
 
Here's an example of one of mine.  You can't read the credits on the large view, but can full-size (when printed) credits on this card are on the side of the tent and again in my artist notes.
 
http://www.greetingcarduniverse.com/-Thinking+of+You+Away+at+Summer+Camp+for+Kid s-greeting+card-826549?pid=826549&aid=137017&ref=cb_card_title
 
Just food for thought!  

I tried that once with a Dover vintage image of a mermaid and was told to remove the credit, so I just deleted the card.
 
Sandra F

Yes, we like that suggestion Doreen with emphasis on keeping the design priority #1.  We've seen credit on some images that is very distracting (too big, too bold, standout color, etc.).
 
We do not allow ".com" on the image, in the "image by" field nor in the Artist's Notes field as you have mentioned.