Internet innovation platforms have increased since 2000. Those intermediate structures link firms with R&D problems (seeker) and people on Internet (solver). The question called “challenge” is linked with a prize if the Internet user’s solution is chosen. The purpose of this article is to put in light contractual arrangements on a specific platform (Innocentive) (IP contracts and assistance of the platform). The aim is to better understand how these mechanisms could lower information asymmetries and uncertainty of technology transfer.