Since Public Domain images are free of copyrights, the user should be able to use them as freely as the user would like, but there may be some exceptions.
Images on ImageWit are released under Creative Commons CC0. To the extent possible under law, the original photographers have waived their copyright and related or neighboring rights to these Images. The user is free to adapt and use them for commercial purposes (except as outlined below) without attributing the original author or source. Although not required, a link back to ImageWit would be appreciated.
Creative Commons can also be referenced with regards to use of these images on social media. In our understanding, the “sub-licensable” clause of CC0 does not prevent the user from uploading a work to a social media platform. It simply articulates that the user is not granting any rights. Those rights have already been waived (or where applicable, authorized by the fallback license) by the licensor; ergo, they’re not the licensee’s to license.
However, there are two areas where the user should take caution:
a) Imagery depicting identifiable persons, logos, brands, etc. may be subject to additional copyrights, property rights, privacy rights, trademarks etc. and may require the consent of a third party or the license of these rights – particularly for commercial applications.
b) Images may not be used in a way that shows identifiable persons in a disgraceful light, or to imply endorsement of products and services by depicted persons, brands, and organizations – unless permission was granted.
If the user would like to pursue use of images with identifiable persons, logos or brands, then it is up to the user to see out those people or companies to gain whatever release the user would like for the intended purpose. ImageWit is solely a repository for images and does not hold or offer any assistance to gaining releases or copyrights.