As an author it is important to protect your copyright and consider carefully just how much of your copyright you are willing to surrender to others, such as a commercial publisher, for example.
If, in a negotiation with a publisher, you are presented with a contract that transfers all rights to the publisher (an exclusive agreement), this may restrict your own rights to publish and disseminate the results of your research.
You may therefore wish to correct such agreements, so that they are acceptable to you.
An author addendum to a publishing contract is a document that can be attached to a publishing contract with a view to assuring the author some specific rights.
A negotiation and a contract is a meeting between two different worlds who must come to an agreement on some common conditions. In other words, both parties must agree on the terms. Although it can be time consuming to enter into negotiations with a publisher on the retention of some of your copyrights, it may actually yield good results.
It is important to ensure that a contract is binding and also includes the addendum. In particular, one should note the following:
The publisher must also sign the addendum.
There are many possibilities for addenda. Sciencecommons.org has made a contract generator with four examples of different author addenda which researchers can use to, for example, retain their right to continue to use the article. The author addendum can be generated in PDF format and attached to a publishing contract. Generate your own author addendum.