This paper presents the application of the collaborative requirements validation process, known as ValReCo. This process, based on standards and good practices, is based on subprocesses as part of the requirements validation cycle. It uses entity extraction techniques using natural language processing in a collaborative environment. Each defined subprocess includes a set of specific activities and tasks, as well as associated roles, guidelines and work products. The objective of this paper is to describe and show a case study of the ValReCo process applied in a real domain, highlighting its main strengths and weaknesses.