Nope , It's Illegal .
If you want to use a photograph that is not in the public domain, and you do not own the copyright yourself, you must obtain the permission of the copyright holder. You do not need to buy the copyright itself. More often, you will simply obtain a license to use the copyright for your purpose, usually requiring payment of a royalty to the copyright owner. Some copyright owners have licensed their photos under licenses such as some of those of Creative Commons, which may enable people to use the photo without payment. If the photograph is in the public domain, you may use the photo freely. A photo may be in the public domain for many reasons, such as expiration of a copyright or intentional release of copyright.
Technically, it does have copyright, but they have allowed you to use it as long as you give them credit.
Copyright protection is automatic, and notification is not required. Virtually any image you encounter is protected by copyright unless specifically noted otherwise.
They probably told you so that if the photo is important to you or you want to enforce your copyright, you can restrict its use.
You are free to use any photo that you find on a photo hosting site as long as there are no copyright restrictions in place. It all depends on your purpose as well.
Generally you can use short quotes with attribution without even asking for permission.
No. Copyright is totally different thing than PHOTO COURTESY. PHOTO COURTESY means give honor to any photo by the quotations of author or owner. You can do the photo courtesy but You can do copyright for your purpose with out the permission of the author or owner. For Example: You have taken any photo and any newspaper or story writer or news channel want to show then they will enlist at the end of the PHOTO that COURTESY of ABC.
"Photos courtesy of" generally means the rightsholder of the photos has given permission for that specific usage. It doesn't mean the photo is no longer protected by copyright; it simply means that particular use has been licensed. Any future uses would require additional licenses.
It can be illegal to print a photo from the web if you do not have permission from the copyright holder. Many images on the internet are protected by copyright law, so you should either purchase the rights to use the image or use images labeled for reuse under Creative Commons licenses.
"Photos courtesy of" generally means the rightsholder of the photos has given permission for that specific usage. It doesn't mean the photo is no longer protected by copyright; it simply means that particular use has been licensed. Any future uses would require additional licenses.
The image of Jesus of Nazareth is in the "public domain" and may be used by anyone. HOWEVER: THE particular PHOTO you want to use may be protected by copyright. Check for the small 'c' enclosed in a circle that will appear on it if it is.
According to the policy manual (link below),Employees, students and visitors are prohibited from the use or duplication ofany copyright materials not allowed by copyright law, fair use guidelinessanctioned by Congress, licenses or contractual agreements.