If you were contributing to a print work, you would likely ask for an agreement stating how your content will be used and what benefit your contribution will bring you. If you are contributing to a website, it is important to know what the site plans to do with your content and what it will allow others to do with it.
Sometimes instructions for requesting permission to use content will be in a TOU, sometimes it will be in a section titled “Permissions.” These instructions are important. Following guidelines regarding use of content you are copying into your work, possibly on your website, protects you from claims of infringement and your work from being removed or shelved.
Copyright compliance instructions should be included on your own webpage or in your book as well. This protects your work by informing others of your desire to have it used in a certain way and stipulates a certain method to request permission.
Example from Copyright Clearance for Creatives, page 87:
For permission to use any portion of the content in this book (or on this website, in the article, or other source), send your request to ____________________________ (Provide your mailing address, email address, or link.)
Want More About Copyright Law?
Order your copy of Copyright Clearance for Creatives for a basic overview of copyright law and essential guidelines on when, how, and where to get permission to use copyright content in your works.