This means the publisher may not have the right to relicense that content for use in other venues. Get a name, and if possible an e-mail address or a phone number for an individual. If the content creator is not on staff, but rather a freelancer, contractor, or volunteer, ask the original publisher to certify that they have specifically obtained from the content creator the right to relicense or have been granted permission to republish the work in question. If they cannot or will not do this, refrain from using the content. If you do get this certification from the original publisher, double-check that information with the original content creator if at all possible.
Some online publishers assume that they have rights to work that they never actually secured.
Your safest bet is to always get permission directly from the content creator. All rights reserved. Do not reproduce or redistribute any material from this document, in whole or in part, without written permission from Content Exchange .