Clickwrap or Click-on is a license agreement for a website or software to which the user agrees by clicking on a button or link.
Once the user clicks on the “I accept” or “I agree” button or link, thereby accepting the license, he or she can access the copyrighted material, and is bound by the terms of the licensing agreement. An “End-User Licensing Agreement” or “EULA” is a classic example of a “clickwrap” agreement. Since the user has no choice except to accept the licensing contract in order to access the content or program, in recent years, both courts and public opinion have begun to perceive these sorts of agreements as at least potentially oppressive.
See also “shrinkwrap contract," “contract of adhesion”