In the agreement you make with Alison to become a Publisher, you agree to obtain the permission to include materials in your course that are held in copyright by a third party. This includes: proprietary text, images, illustrations, data, multimedia and any other materials produced or owned by third parties.
Third party copyright material includes content that is not your own work, or material that is not in the public domain. It may also include material which is your own work or part of your own work and for which you do not have permission to use in certain contexts.
If you use permission to use content that is copyright free, you may be required to credit or reference the author or producer of this material.
Alison does not take responsibility for copyright infringement by Alison Publishers, including Self-Publishers and Contractor Publishers. Alison Publishers assume personal responsibility and liability for any copyright material or intellectual property infringement included in their courses.
To use content produced solely by, or in collaboration with, third parties in your courses, without infringing copyright or intellectual property, Alison Publishers are advised to agree to use terms and conditions laid out by the producers/owners/collaborators of this content, in order to avoid any legal liability.
These are some copyright-free sites that you can use for image sourcing: https://pixabay.com/
For more information on copyright, you can attend Alison’s webinars.