We are finishing up a job- as subcontractors, under a GC. I have billed for the retention, and that is all that is left for us to be paid. But the GC has filed the Cert of Substantial completion dated Aug 1st. Now they are requesting a change order to be added to the job. This will obviously stretch out the time before I am paid the remainder of what I am owed. I am afraid my lien rights will expire before the retention would even be due- now that I have to add a change order and with the 30 day payment terms...my lien rights are due to expire in 120 days. I know this GC and that will not be enough time to get paid.