I have several invoices outstanding for project management I performed for a general contractor across multiples sites, so I'm working on filing a lien for the value of the time I spent working on each project against each corresponding property. Can I file two lines on one property? One would be for project management work, the other would be for construction (handyman) labor I performed on the site under a separate invoice. When I send my NOI, can I send all of them in one envelope to the GC? Do I have to send the owners NOI to their residential address, or can I send it to their project address if it has a mailbox?