Hello, Is it possible to file a mechanics lien for unbilled change orders and retention? We have outstanding changes that haven't been approved yet so we are unable to bill for them. And typically we're not able to bill retention until the project has been completed. According to our project manager, all the changes are legitimate, the work has been completed. Our lien rights are going to expire soon so what would we need to do in this situation? Can we still file a lien for everything outstanding?