The best way to communicate this in the system would be to add VOID to the project name (Article) and the External Notes on the ProjectThen you should do is mark the project as 'Lost'. This way they won't be able to complete the sign/ pay processRelated ArticlesSend An Invoice To A ClientHow can I cancel a project?Can a client sign a Lost project?How can I send my client an invoice instead of a quote?What happens when I mark a project as 'Lost'?