I have emailed Matthew ford of Adobe Stock on several occasions about contributors selling images on their site that appear to be not created by the seller. They are ignoring my emails and the images are still for sale. I believe that this is a very bad approach to take as others buy these images in thinking that they are original creations. If you have purchased such an image then I suggest that you ask for your money back and try to get some compensation especially if you have used any of the images professionally where you could be open to being sued yourself.
I don't imagine that I will be allowed to post any more messages such as this as it shows Adobe Stock as less than professional.
Here are just a few examples of the thousands of images on Adobe Stock from 198 users images (so far found)
Lots more to follow if allowed to post more.
I apologize that no one responded to your emails and thank you for bringing this to our notice.
At Adobe, we respect the intellectual property rights of others and we expect our users to do the same. If you believe someone has uploaded content to an Adobe service that infringes your copyright or your trademark, please let us know by sending us an IP infringement notice.
Please see DMCA | Adobe for more details.